Sorry missed this post. If I understand correctly, are you asking why I need to mod the bios? Well, I think you know why. Same reason as everyone else here! I don't want to hijack this thread into irrelevant discussion. Sorry. But I admit I got it wrong. I simply took CPU-Z word for it and though it was pure phoenix bios. I didn't know there was a "phoenix award" bios. Thanks anyway guys, I'll check the other thread out that was given by busykid.
As long as your vista was activated as a HP as well, then SLIC 2.1 is designed to be backward compatable with 2.0, in short yes, you can still dual boot for now