"Right. So can I boot a laptop or PC from a Linux cd without actually swapping operating systems?"
"buy the relevant connector from ebay "
This advice is plain wrong in my opinion. Just the sort of crap you get when you ask questions on the net. Yes, I know, how do you know I'm not a fool like this poster?
"put in freezer bag, into freezer for a few hours."
Yes, that worked for Skyway TA's as well.
This thread is a good example why you don't ask questions on STW.
(Footnote - I make money out of computer repairs and data recovery. I'm not a 'professional', but I do a damn sight better than PC World).