I was chatting with a friend the other day about recovering the MBR on one of my Windows systems. He is a seasoned admin and recommended the following:
1. Boot from the Windows XP CD (the UBC may also work) and select the recovery console.
2. Once the recovery console comes up you can run fixmbr to fix up the master boot record.
This is a pretty simple fix and one I want to note for future use. I don’t always use Windows, but when I do I like to have fixes for blue screens and MBR troubles. :)