if you boot to a Win 7 disc, and go to the Recovery Console, your can run "fixmbr" to restore the MBR. There is also a "fixboot" command as well if you need it.
On my Driver and Application page in the Stickies, you'll find a Win 7 OS disc image, a Recovery iso, and a copy of the Driuvers and App CD that came with the machines. It also has links for the current versions of drivers, and some of the applications.
You could also just wipe everything and do a clean install with a Win 7 disc and use my driver collection.
[SIGPIC]Kicking Ass Since Today[/SIGPIC]