Windows 7 - Should I buy a Windows 7 Upgrade or Full Install?

Hey,

Let me start by explaining my situation.

I am running Windows 7 Ultimate build 7229 32 bit on my MSI GX630 laptop. (which is running very well, I may add)

My problem is when I upgraded to Windows 7 from Vista Ultimate, I failed to back up my system before doing so.


Like a Jack***, I misread the disks that came with my laptop, over looking the words "RESERVED FOR" meaning I assumed that they already had backed up my system to those disks, which they didn't. Jack***!

So anyways, I planned on getting the Windows 7 Family pack. (I am leaning toward the Professional version)

Since I no longer have Vista installed on my laptop any more what should I do?

Can I get the upgrade version and use my Legal Windows XP disk to do a Full install like I did when I built my desktop and installed Windows XP on it? (I used and old windows 95 disk in the CD ROM drive)

Or should I just buy the Full install?

I planned on installing Windows 7 on 3 systems, 2 of them ACTUALLY have Windows XP operating systems on them, I haven't fried them, YET!

I don't want to spend the extra money for the Full install since only 1 of the 3 systems may need it. (and I want to do what is LEGAL.)

I know I have sometime until Windows 7 Retail version gets released, but I figured I would ask now so I can plan on how much money I am going to have to spend.

Thanks in Advance.

Fubar65