Not sure, but you can download a release candidate from Microsoft now... Since I don't do anything important on my PC (it is a PC after all! ), I went for it, and installed the update. There's also a pop-up blocker included with IE in this update. http://www.microsoft.com/technet/prodtechnol/winxppro/sp2preview.mspx
It has been fairly reliable for me, no BSOD, no issues with any of the software I run... Having said that, if I relied on it for work, I probably wouldn't have taken the risk.
I haven't run command prompt in a while but I believe it's cd c:/ if that's wrong somebody correct me please.