You ghosted, if thats a word, your c: to d:. You installed sp2 on your
d:. Now the c: drive will not boot. Is windows calling your d: drive
c:? Pretty confusing to me, but if that is the case I would say that
the master boot record got altered when you installed sp2. The drive
with sp2 is probably your main drive now. Pull the drive that is
booting out of the machine, then set the jumpers to the drive that
isnt booting to master and see if it boots. If it does then you know
that your drive is ok, its just that xp is getting confused as to what
to boot to beings how it is looking at two master boot records,.