Hmmm - I had this little bell ringing in my memory about a trick I'd read about a while back, and so I checked, and may have something that can be a quick repair. Here's an article from over at AnandTech's Operating System FAQs pages:
http://www.anandtech.com/guides/viewfaq.aspx?i=90
I wasn't clear in my original reply, sorry about that - I was referring to the XP recovery console, not the Win2k one. I was thinking that a repair begun from the XP CD would yield the XP bootloader once again (rather than the Win2k) - but I like Anandtech's idea even better, since it involves simply copying over the XP bootloader and XP's NTdetect from the XP CD (to the Win2k root) . Should be a much faster repair.
In answer to your fixboot questions: I'll have to check my XP/2k books for the details -to be entirely sure - & get back to you. My first guess would be that XP's fixboot would work - not sure about 2k's.
. . . Gary
[I'll be able to check back in tonight after a few interviews, and after my daughter's gymnastics class]