DasBoot

DasBoot is this great freeware application that creates a repair/diagnostic tookit for your Mac right on a portable USB/Firewire device.
Unfortunately, this only makes your device a bootablable device, so you’ll need to add some disk recovery software on it, which usually isn’t cheap. But never fear…. at least the creation of the boot device was!
Lifehacker < Subrosasoft