HaloMods "Classic" Read-only Archive

OK, i dont even know where to start search for something like mojopac. I need to find one that works on xp, and maybe vista, and is free or at least has a trial that lasts more then a few days. Any ideas?

You could put Ubuntu on a Portable drive, and then store your applications too.

Ubuntu seems to be a linux based thing so most of my programs arent going to run on it.