There's no reason to try to switch to Onboard Video. If you were able to see the message "Operating System not found" plugged into your 8500, then your card is working.
THE VIDEO CARD IS NOT THE PROBLEM HERE.
If you can't get your PC to boot from a CD, then you're screwed ... unless it's the case that somehow your PC got set to boot from something other than your HD or a CD, AND neither of those things is in the boot list at all. Highly unlikely to have occurred, but that's the logical first thing to check: Is your HD set to be the first boot device?
If NOT, then make it so, and try booting your machine. If it works, cool. If it is not so, or it doesn't work, then you need to make your CD the first boot device, and boot from there using the Windows disc, and let Windows Setup try to repair the necessary Windows files.
IOW, unless the problem is entirely caused by the boot order in your bios not allowing the board to find your OS, then the issue is w/the boot files, in which case you pretty much have to get your PC booted from the Windows CD.
I don't know how else to explain this to you kid ...
BTW, Windows 7 doesn't use an ntldr file ... nice try though.
Also ... is anyone else starting to feel trolled aside from me?
Edited by brettjv - 2/22/11 at 8:14pm