Update:

I guess i found a way to create a Player for EVERY public OS around the whole World. No dependencys, no install. Just copy on mmc and it runs.
GUI design is just as simple as HTML could be.

But whats the Problem..... no folder select

www.voxters.de/jQuery.jPlayer.2.0.0.demos.zip
www.voxters.de/jQuery.jPlayer.2.1.0.source.zip

Anyone out there who is willing to give some assistance?