I personally haven't heard of playing around with your chipset drivers to dual boot, if you go for the extra hard drive option you won't need to touch you chipset drivers. However if you direct me to where you found this information I might be able to help.

When you use two drives like I have you essentially have two PCs with each hard drive owning the PC when you choose to boot from it.

If you know anyone you can borrow a Vista DVD from just so you can access the recovery console that would certainly help.

Regards

Martin