See, I thought so too. But, Win2Kpro installs every goddamned thing under the sun so that you never need the CD again. Or so it seems.
But man is that strange. I didn't know XP had it.
Could it just be because one team worked on Win98, another on Win2K, and different one on XP? Who knows.
Winipcfg is not available to Win2K either. That's ok, because ipconfig isn't hard to use.
-EDIT- I modified my search on google (probably could have saved some time) and found that no, msconfig is not available to Win2k - instead I have to use a copy from Win98 or XP. Go figure.