I have a question on something that I've been thinking about. I have an Asus laptop with a pretty measly 320 gig HDD. If I get a copy of Windows 7 OEM along with a new, bigger HDD from New Egg can I put a copy of Windows 7 on the laptop? Will a regular copy of Windows 7 be compatible with a big box OEM motherboard or do I have to use Asus recovery CD's?