What I'm Talking about is a flash drive intalled and running B4PPC, so you just needed to run B4PPC as you would in a "normal" desktop computer... bit like a Live CD....
I have found 2 articles on how to create a portable app, but it requires some scripting, and I'm not too familiar with that, so It seems to be possible, but it will take some time to figure...
Unless some other kind user attempts it...