BackTrack is a Live CD based on SLAX and is a combination of Whax and Auditor. Listed as one of the 10 best Security Live CD Distros by DarkNet in March of 2006. Version Pre 1.0 of the Live CD is on the original SecureDVD distribution. A newer version of SecureDVD is available with Version 1.0 of BackTrack.
The current version is a beta release of the 2.0 Version.