If you've replaced the MBR then GRUB doesn't matter. It's not there anymore. Have you tried a Repair Install after restoring the MBR? I think you'd be better off posting this in the Windows 7 forum.
Thanks for the quick reply. I tried the MBR and the last option, forgot what it's called. I guess I know what I'll be doing next weekend. Unless I get another HD, I'll be running Linux in a VM from now on.