Use of the data recovery software included in Ubuntu-rescue-remix is detailed here:

http://help.ubuntu.com/community/DataRecovery

As of version 8.04Alpha, a shortened version of that page is found on the cd as a file named CheatSheet.txt. The cheat sheet is part of the ubuntu-rescue-remix metapackage and can be found in /usr/share/doc/ubuntu-rescue-remix/

The live CD and USB images are made using the instructions found here:

https://help.ubuntu.com/community/LiveCDCustomizationFromScratch