It wasn't a headache at all. It took me about 30 minutes. And 10 minutes of that was me letting Windows run the repair which did nothing. And another 10 minutes was me trying to fix it ie. try safe mode, google search, etc. Then while looking at the bios, it hit me to check the sata options in the bios. That was the key. If I would have checked it first it would have been a simple upgrade, under 10 minutes easy. I just assumed it would be set to AHCI in 2011 not IDE. Even with my goof it was way quicker than a full re-install of windows and reconfigure and install other software. That would have been 1+ hours.
As for my upgrade it was a big change in hardware type. I went from a ASRock 939Dual-SATA2, the one with the fully functional AGP slot and PCI-express slot, to a Biostar TP67B+. Windows 7 handled it very smoothly. I booted to windows it found the hardware and rebooted again. I then installed the NIC drivers and played Borderlands online for 2-3 hours without any problems. My fps basically doubled.