Well if you read the rest of the thread I think you are talking about you would see about a dozen ppl including me who had no issues going to sp1 and keeping current ocing.....
Some will say win98 which has been around longer and thus has a majority of the bugs and kinks worked out would be better...in my case it did not, but I am running FE version...
I could only oc to 2.46ghz with win98 no matter the vcore and then it would load but become lethargic...loaded up winxp on partition and I am at 2.74ghz stable and gcan even run at 2.8ghz with 1.73v but wont pass prime95 testing...
I also think winxp checks more things at startuo and thus may be less liklely to let you load up windows on a flaky oc level...generally if you load winxp into the desktop it is far more stable then just getting win98 to load..This is my experience running both oses as a dual bootup and have seen how they react side by side for quite awhile now...