Subrosasoft has today released a new software product called DasBoot which allows you to take any bootable CD, and make your iPod, flash drive, or other MP3 player bootable quickly and easily! You then get a portable repair
utility similar to TechTool ProToGo, but it frees you up to use any software you want. Better than that, the software it self is free!
From their website:
"Do you have a shiny new iPod in your pocket ? Or perhaps a flash drive or small portable hard drive ? Now you can turn it into a Mac OS X diagnostic, repair, and maintenance tool. DasBoot allows you to take any third party boot CD (such as those shipped by SubRosaSoft.com Inc, Prosoft Engineering Inc, Alsoft Inc, or Micromat Inc) and quickly create a bootable diagnostic device that contains any of your own utilities you may wish to install."