This is an update to my original post.
After several failed attempts, I gave up on RC1 and uninstalled it. I then installed Beta 6, and was able to complete an XP installation without any difficulties at all. I then reinstalled RC1, and am able to run the XP installation originally created with Beta 6.
For some reason, RC1 simply didn't want to install XP on my machine (black Macbook).
I see that RC2 has been released, so I'm going to try to install XP using that (just to see if I can--the XP installation from Beta 6 is working just fine).
Last edited: May 31, 2006