Hey xsurf,
Welcome to the forums.
That's a good question. Last time they updated Pentesting with BackTrack was last year in
March. According to the
BackTrack wiki page, that's a couple months after the initial release of BT4. I'd take a guess and assume they're going to update it for BT5 . You should send over your questions over to their
Contact Form and wait to hear an official answer.
I can only imagine how much fun PWB v4 can be. Plus upgrades between versions for existing students are kept affordable. If you get an official answer from them, please let us know!