Ewww. Read this. I'd rather starve, personally.
The CRN Test Center recently evaluated Windows XP Service Pack 2 Release Candidate (RC) 2 - and 3 of their 5 test machines no longer worked, blue-screens of death appearing after the install completed. Whoopsie. Sounds like SP2 RC2 is still not ready for prime time, hopefully this gets corrected soon - because that service pack is desperately needed.