can some experts help a noob like me with 2 things please?

;Copyright (C) 2004-2008 John T. Haller
;Copyright (C) 2008 Travis Carrico

;Website: http://PortableApps.com/SecretMaryoChroniclesPortable

;This software is OSI Certified Open Source Software.
;OSI Certified is a certification mark of the Open Source Initiative.

;This program is free software; you can redistribute it and/or
;modify it under the terms of the GNU General Public License
;as published by the Free Software Foundation; either version 2
;of the License, or (at your option) any later version.

;This program is distributed in the hope that it will be useful,
;but WITHOUT ANY WARRANTY; without even the implied warranty of
;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;GNU General Public License for more details.

;You should have received a copy of the GNU General Public License
;along with this program; if not, write to the Free Software
;Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

!define PORTABLEAPPNAME "OpenSonic Portable"
!define APPNAME "OpenSonic"
!define NAME "OpenSonicPortable"
!define VER "1.1.0.0"
!define WEBSITE "PortableApps.com/OpenSonicPortable"
!define DEFAULTEXE "OpenSonic.exe"
!define DEFAULTAPPDIR "OpenSonic"
!define DEFAULTSETTINGSPATH "settings"

;=== Program Details
Name "${PORTABLEAPPNAME}"
OutFile "..\..\${NAME}.exe"
Caption "${PORTABLEAPPNAME} | PortableApps.com"
VIProductVersion "${VER}"
VIAddVersionKey ProductName "${PORTABLEAPPNAME}"
VIAddVersionKey Comments "Allows ${APPNAME} to be run from a removable drive.  For additional details, visit ${WEBSITE}"
VIAddVersionKey CompanyName "PortableApps.com"
VIAddVersionKey LegalCopyright "PortableApps.com and contributers"
VIAddVersionKey FileDescription "${PORTABLEAPPNAME}"
VIAddVersionKey FileVersion "${VER}"
VIAddVersionKey ProductVersion "${VER}"
VIAddVersionKey InternalName "${PORTABLEAPPNAME}"
VIAddVersionKey LegalTrademarks "PortableApps.com is a Trademark of Rare Ideas, LLC."
VIAddVersionKey OriginalFilename "${NAME}.exe"
;VIAddVersionKey PrivateBuild ""
;VIAddVersionKey SpecialBuild ""

;=== Runtime Switches
CRCCheck On
WindowIcon Off
SilentInstall Silent
AutoCloseWindow True
RequestExecutionLevel user

; Best Compression
SetCompress Auto
SetCompressor /SOLID lzma
SetCompressorDictSize 32
SetDatablockOptimize On

;=== Include
!include "GetParameters.nsh"
!include "MUI.nsh"
!include "TextFunc.nsh"
!insertmacro ConfigWrite
!insertmacro ConfigRead

;=== Program Icon
Icon "..\..\App\AppInfo\appicon.ico"

;=== Icon & Stye ===
!define MUI_ICON "..\..\App\AppInfo\appicon.ico"

;=== Languages
!insertmacro MUI_LANGUAGE "English"

LangString LauncherFileNotFound ${LANG_ENGLISH} "${PORTABLEAPPNAME} cannot be started. You may wish to re-install to fix this issue. (ERROR: $MISSINGFILEORPATH could not be found)"
LangString LauncherAlreadyRunning ${LANG_ENGLISH} "Another instance of ${APPNAME} is already running. Please close other instances of ${APPNAME} before launching ${PORTABLEAPPNAME}."
LangString LauncherAskCopyLocal ${LANG_ENGLISH} "${PORTABLEAPPNAME} appears to be running from a location that is read-only. Would you like to temporarily copy it to the local hard drive and run it from there?$\n$\nPrivacy Note: If you say Yes, your personal data within ${PORTABLEAPPNAME} will be temporarily copied to a local drive. Although this copy of your data will be deleted when you close ${PORTABLEAPPNAME}, it may be possible for someone else to access your data later."
LangString LauncherNoReadOnly ${LANG_ENGLISH} "${PORTABLEAPPNAME} can not run directly from a read-only location and will now close."

Var PROGRAMDIRECTORY
Var SETTINGSDIRECTORY
Var ADDITIONALPARAMETERS
Var EXECSTRING
Var PROGRAMEXECUTABLE
Var INIPATH
Var DISABLESPLASHSCREEN
Var ISDEFAULTDIRECTORY
Var SECONDARYLAUNCH
Var MISSINGFILEORPATH
Var WIDTH
Var HEIGHT
Var ONELESSW
Var ONELESSH
Var LASTCOMPUTER
Var CURRENTCOMPUTER

Function ".onInit"
System::Call 'user32::GetSystemMetrics(i 0) i .r0'
System::Call 'user32::GetSystemMetrics(i 1) i .r1'
StrCpy $WIDTH $0
StrCpy $HEIGHT $1

FunctionEnd

Section "Main"
	;=== Check if already running
	System::Call 'kernel32::CreateMutexA(i 0, i 0, t "${NAME}2") i .r1 ?e'
	Pop $0
	StrCmp $0 0 CheckForINI
		StrCpy $SECONDARYLAUNCH "true"

	CheckForINI:
	;=== Find the INI file, if there is one
		IfFileExists "$EXEDIR\${NAME}.ini" "" NoINI
			StrCpy "$INIPATH" "$EXEDIR"
			Goto ReadINI

	ReadINI:
		;=== Read the parameters from the INI file
		ReadINIStr $0 "$INIPATH\${NAME}.ini" "${NAME}" "${APPNAME}Directory"
		StrCpy "$PROGRAMDIRECTORY" "$EXEDIR\$0"
		ReadINIStr $0 "$INIPATH\${NAME}.ini" "${NAME}" "SettingsDirectory"
		StrCpy "$SETTINGSDIRECTORY" "$EXEDIR\$0"

		;=== Check that the above required parameters are present
		IfErrors NoINI

		ReadINIStr $0 "$INIPATH\${NAME}.ini" "${NAME}" "AdditionalParameters"
		StrCpy "$ADDITIONALPARAMETERS" $0
		ReadINIStr $0 "$INIPATH\${NAME}.ini" "${NAME}" "DisableSplashScreen"
		StrCpy "$DISABLESPLASHSCREEN" $0

	;CleanUpAnyErrors:
		;=== Any missing unrequired INI entries will be an empty string, ignore associated errors
		ClearErrors
		StrCpy "$PROGRAMEXECUTABLE" "${DEFAULTEXE}"
		;=== Correct PROGRAMEXECUTABLE if blank
		StrCmp $SETTINGSDIRECTORY "" "" CheckForProgramINI
			StrCpy "$SETTINGSDIRECTORY" "$EXEDIR\Data\${DEFAULTSETTINGSPATH}"
			Goto CheckForProgramINI
			
	CheckForProgramINI:
		IfFileExists "$PROGRAMDIRECTORY\$PROGRAMEXECUTABLE" FoundProgramEXE NoProgramEXE

	NoINI:
		;=== No INI file, so we'll use the defaults
		StrCpy "$ADDITIONALPARAMETERS" ""
		StrCpy "$PROGRAMEXECUTABLE" "${DEFAULTEXE}"
		StrCpy "$DISABLESPLASHSCREEN" "false"

		IfFileExists "$EXEDIR\App\${DEFAULTAPPDIR}\${DEFAULTEXE}" "" NoProgramEXE
			StrCpy "$PROGRAMDIRECTORY" "$EXEDIR\App\${DEFAULTAPPDIR}"
			StrCpy "$SETTINGSDIRECTORY" "$EXEDIR\Data\${DEFAULTSETTINGSPATH}"
			StrCpy "$ISDEFAULTDIRECTORY" "true"
			GoTo FoundProgramEXE

	NoProgramEXE:
		StrCpy $MISSINGFILEORPATH $PROGRAMEXECUTABLE
		MessageBox MB_OK|MB_ICONEXCLAMATION `$(LauncherFileNotFound)`
		Abort
	
	FoundProgramEXE:
		;=== Check if already running
		StrCmp $SECONDARYLAUNCH "true" CheckForSettings
		FindProcDLL::FindProc "$PROGRAMEXECUTABLE"
		StrCmp $R0 "1" WarnAnotherInstance CheckForSettings

	WarnAnotherInstance:
		MessageBox MB_OK|MB_ICONINFORMATION `$(LauncherAlreadyRunning)`
		Abort
	
	CheckForSettings:
		IfFileExists "$SETTINGSDIRECTORY\config.xml" SettingsFound
		StrCmp $SECONDARYLAUNCH "true" SettingsFound
		;=== No settings found
		StrCmp $ISDEFAULTDIRECTORY "true" CopyDefaultSettings
		CreateDirectory $SETTINGSDIRECTORY
		Goto SettingsFound
	
	CopyDefaultSettings:
		CreateDirectory "$EXEDIR\Data"
		CreateDirectory "$EXEDIR\Data\settings"
		CopyFiles /SILENT $EXEDIR\App\DefaultData\settings\*.* $EXEDIR\Data\settings
		Sleep 100

	SettingsFound:
		StrCmp $DISABLESPLASHSCREEN "true" GetPassedParameters
			;=== Show the splash screen before processing the files
			${ConfigRead} "$SETTINGSDIRECTORY\config.xml" '	' +5
			InitPluginsDir
			File /oname=$PLUGINSDIR\splash.jpg "${NAME}.jpg"	
			newadvsplash::show /NOUNLOAD /PASSIVE 1500 0 0 -1 /L $PLUGINSDIR\splash.jpg
			Goto GetPassedParameters
			InitPluginsDir
			File /oname=$PLUGINSDIR\splash.jpg "${NAME}.jpg"	
			newadvsplash::show /NOUNLOAD 1500 0 0 -1 /L $PLUGINSDIR\splash.jpg

	GetPassedParameters:
		;=== Get any passed parameters
		Call GetParameters
		Pop $0
		StrCmp "'$0'" "''" "" LaunchProgramParameters

		;=== No parameters
		StrCpy $EXECSTRING `"$PROGRAMDIRECTORY\$PROGRAMEXECUTABLE"`
		Goto AdditionalParameters

	LaunchProgramParameters:
		StrCpy $EXECSTRING `"$PROGRAMDIRECTORY\$PROGRAMEXECUTABLE" $0`

	AdditionalParameters:
		StrCmp $ADDITIONALPARAMETERS "" WriteSettings

		;=== Additional Parameters
		StrCpy $EXECSTRING `$EXECSTRING $ADDITIONALPARAMETERS`

	WriteSettings:
		StrCmp $SECONDARYLAUNCH "true" LaunchAndExit
		${ConfigWrite} "$SETTINGSDIRECTORY\config.xml" '	' $R0
		Sleep 100
		IfFileExists "$SETTINGSDIRECTORY\${NAME}Settings.ini" "" +2
		ReadINIStr $LASTCOMPUTER "$SETTINGSDIRECTORY\${NAME}Settings.ini" "${NAME}Settings" "LastComputer"
		System::Call 'kernel32.dll::GetComputerNameA(t .r0,*i ${NSIS_MAX_STRLEN} r1)i.r2'
		StrCpy $CURRENTCOMPUTER $0
		StrCmp $LASTCOMPUTER $CURRENTCOMPUTER MoveFile
		
		IntCmp "2148" "$WIDTH" "" "" +5
		IntCmp "1636" "$HEIGHT" "" "" +4
		StrCpy "$ONELESSW" "2048"
		StrCpy "$ONELESSH" "1536"
		Goto WriteOneLess
		IntCmp "1700" "$WIDTH" "" "" +5
		IntCmp "1300" "$HEIGHT" "" "" +4
		StrCpy "$ONELESSW" "1600"
		StrCpy "$ONELESSH" "1200"
		Goto WriteOneLess
		IntCmp "1380" "$WIDTH" "" "" +5
		IntCmp "1124" "$HEIGHT" "" "" +4
		StrCpy "$ONELESSW" "1280"
		StrCpy "$ONELESSH" "1024"
		Goto WriteOneLess
		IntCmp "1124" "$WIDTH" "" "" +5
		IntCmp "868" "$HEIGHT" "" "" +4
		StrCpy "$ONELESSW" "1024"
		StrCpy "$ONELESSH" "768"
		Goto WriteOneLess
		IntCmp "900" "$WIDTH" "" "" +5
		IntCmp "700" "$HEIGHT" "" "" +4
		StrCpy "$ONELESSW" "800"
		StrCpy "$ONELESSH" "600"
		Goto WriteOneLess
		StrCpy "$ONELESSW" "640"
		StrCpy "$ONELESSH" "480"
		Goto WriteOneLess

	WriteOneLess:
		${ConfigWrite} "$SETTINGSDIRECTORY\config.xml" '	' $R0
		${ConfigWrite} "$SETTINGSDIRECTORY\config.xml" '	' $R0
		${ConfigWrite} "$SETTINGSDIRECTORY\config.xml" '	' $R0
		Sleep 100
	
	MoveFile:
		WriteINIStr "$SETTINGSDIRECTORY\${NAME}Settings.ini" "${NAME}Settings" "LastComputer" "$CURRENTCOMPUTER"
		Rename "$SETTINGSDIRECTORY\config.xml" "$PROGRAMDIRECTORY\config.xml"
		Sleep 100
		Goto LaunchNow
	
	LaunchNow:
		SetOutPath "$PROGRAMDIRECTORY"
		ExecWait $EXECSTRING
		
	CheckRunning:
		Sleep 1000
		FindProcDLL::FindProc "${DEFAULTEXE}"                  
		StrCmp $R0 "1" CheckRunning
		Rename "$PROGRAMDIRECTORY\config.xml" "$SETTINGSDIRECTORY\config.xml"
		Delete "$PROGRAMDIRECTORY\stdout.txt"
		Delete "$PROGRAMDIRECTORY\stderr.txt"
		Delete "$TEMP\cegui.log"
		Sleep 100
		Goto TheEnd

	LaunchAndExit:
		SetOutPath "$PROGRAMDIRECTORY"
		Exec $EXECSTRING
	
	TheEnd:
		newadvsplash::stop /WAIT
SectionEnd

You'll get there. Hint: Notepad++ or Geany or HMNIS Edit is very helpful.

start here:
https://portableapps.com/node/14868