Learn network/server intrusion techniques
This site offers free live pentest training discs (for download), the owner of the site is an author for hakin9 - extreme I.T magazine, heres a better explanation of the disks. Hope you enjoy : )
http://de-ice.net/hackerpedia/index.php/De-ICE.net_PenTest_Disks
I think you miss the point of this thread. The pen test disks have built in vunerabilites in which backtrack was used to exploit them. They give a live testing ground to learn penatration testing.
Also Backtrack 2 while the latest stable release, the relatively bug free BT3 beta is better in my opinion.
Another Great Distro to learn pen testing with is DVL
AldarHawk wrote: Another Great Distro to learn pen testing with is DVL
http://damnvulnerablelinux.org/
Forgot all about DVL, thanks for reminding me AldarHawk.