Re: I'm a bit confused.....
You could have remained in a topic on this subject.
To answer your question: I've had BT installed on a flash drive, 2GB, 4GB and 8GB, all worked perfectly for my purpose. Currently I have installed on a 4GB!
Follow the link:
USB Live | BackTrack Linux - Penetration Testing Distribution
Regards,
Re: I'm a bit confused.....
Well, it depends ... 2Gb will do the job, however if you run a persistent BT setup you will need room for updates, new packages, rainbow tables ... so go for a 8Gb thumb (at least 6 Gb for changes).