Here is what I used:
ibProArcade is compatible to PNflashgames, some information about it:
> download the games at
www.pnflashgames.com in POSTNUKE format
> PNflashgames can submit their score and play again without reloading the page or going back to ibProArcade
to install a PNflahgames-Game, do the following:
1) locally unzip the archive
2) upload the .swf-file to /arcade
3) create two .gif-files (gamename1.gif and gamename2.gif) based on the .gif provided with the game
4) upload the two .gif-files to /arcade/images/
5) enter AdminCP -> Arcade -> Add Game and manually add it (using the first upper section)