Changing motherboard/cpu

WINXP-SP2 and a whole bunch of programs loaded on a PC with
motherboard/cpu/memory issues! Is it possible to just change out the whole
board, etc., reconnect the drives and go. The original XP installation was
with a full XP-Pro installation CD. I don't want to have to do a complete
reinstallation of all the programs as many of them are downloads that I'd
probably have a hard time finding the registration ID's. The reason that
I'm asking is that I've heard so much discussion about XP being locked to a
motherboard that I'm reluctant to try anything without checking with you
experts first. TIA!

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Gary
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