im useing diablo2 as an example, just replace diablo with what your file names are
Get Bat-To-Exe-Converter
http://www.download.com/Bat-To-Exe-Converter/3000-2069_4-10555897.html
Make a new folder the G:\PortableApps\
im going to name mine d2
enter the folder
Copy the program FOLDER into this directory
G:\PortableApps\D2\Diablo II
now make a notepad file in the G:\PortableApps\D2\ directory
copy or write this in do not write in the ( )
cd Diablo II\ (folder containing program)
Diablo II.exe (name of exe that starts the program)
goto save as and name it DiabloII.bat (add the .bat)
save it
open your Bat-To-Exe-Converter
for batchfile navigate to the .bat file you just made
you dont need to fill in anything else but at the bottom theirs a Ghost Application box, tick it unless you want an annoying box opening with your program
take your new compiled exe and put it in your G:\PortableApps\D2
now open your portable apps launcher and click options and refresh app icons
as you see, your newly compiled exe is saying use me!
if you want to use your original icon that the program had grab icon sucker 2.0
http://www.download.com/Icon-Sucker/3000-2195_4-10053519.html?tag=mncol&...
some programs (winamp for example) your going to have to make another bat
in the notepad its
taskkill /f /im winamp.exe (process name)
you can find the process name by useing ctrl alt delete and looking under process's
this guide may be posted anywhere but you must give me credit as Givemhell
your also welcomed to revise it, and repost but once again, as the original poster i deserve the credit
mod's feel free to sticky this 
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