Try this product, it is easy to use and fairly straightforward.
As a disclaimer, I have had mixed results. I believe this is due to driver issues with certain combination of hardware and driver problems.
Notably we made one key that would boot Fedora 10 (created from a liveCD iso) to an older Dell laptop, but my Dell Optiplex 320 desktop would crash midway through boot. It did that when I tried the LiveCD from a CD though also, so in that case apparently the LiveCD didn't like my Bios or something.
Anyway, this seems to be a bit on the Voodoo Computing side of things atm.