I've used some portableapps packaged apps, but without using their launch menu (imho there are much better free portable apps launchers, like
http://www.pegtop.net/start)
Regarding portableapps setups, AFAIK:
- portableapps setups exes are named "[programname].paf.exe".
- to install a *.paf.exe, just run it, it prompts you for the destination folder and that's it.
- once installed, you always end up with a dir tree like this:
"App" dir
"Data" dir
"Other" dir
[programname].exe file
Judging by the few portableapps I'm using, the [programname].exe in the root dir looks like a shortcut to the "real" .exe, thas is located in a "App" subdir
I think that the porableapps launcher sucks...
But their dir tree organization seems to allow for easy data backups and app upgrades (providing the app actually writes data in the Data dir...)