Backtrack is the world best Linux distribution for Ethical Hacking and Penetration testing, with hundreds of tools built in and configured ready to go.
The latest distribution can be downloaded from here
and this is a screen shot from one of my systems I upgraded this morning, from a DVD ISO image I cut with Brasero.
This is a Dell Mini10 system so can be a bit fussy with the drivers etc, but everything worked fine out of the box. Even the boot-splash works this time (using the "fix-splash800" command).
For my other test system I used the alternative method to get to R2, using the the following commands.
apt-get update && apt-get dist-upgrade
This was a pretty quick process, and apart from my Firefox shortcuts disappearing, pretty seamless.
I've been using these systems all day and haven't found any issues yet, so all good so far.