how create portable apps??

why don't you hang around the portableapps IRC network
#portableapps on irc.freenode.com

they're pretty nice folks around there, they taught me a little bit
and i'm sure they're be happy to teach you some

also check out the development page, here
and you will need these program to make your portableapps, so have them downloaded and installed before coming on.

NSIS

Portable App Compactor

PortableApp Creator

Tennix portable
a good simple for portable app that leaves nothing behind.

Things can be added and the names of everything need to be changed, in like tennx! Portable.nsi use notepad to find and replace all "tennx! Portable" with "*your apps's name" as do the same with PortableappsInstaller.nsi as well as change the copyright and anything else that needs to be

but for lots of help c'mon the IRC channel for a little bit and ask the devs anythign you want (especally Ryan he loves answering questions )

This site makes there portableapps with a app called NSIS.
look through some on the launcher sources (In: Other\Sources\APPNAMEPortable.nsi)
Install NSIS and look through the help file. When you come across a code and you dont know how it works. search it up in NSIS's help file. i will tell ya.

after, then you have to get familiar with the .paf format (the installer)
you really dont have to change the installer code that much but the name of the installer and version number xD

after some time, you'll be ready