I see what you're syaing, but I was hoping to be able to put the usb drive in any computer and boot up the program without anything being installed in the windows directory. For instance, at portableapps.com you can get Mozilla's Firefox browser that will act like this. It runs completely off of the drive without needing to place entries in the windows registry and such.

Like the fellow above mentioned, there's some brilliant programmer working on tweaking Limewire to make a portable version like this. I'll just have to wait patiently until it gets sorted out.