How do I clean install Windows 7 upgrade to new mac?

Hello, I have kind of a complicated question...
Is there a way to install Windows 7 Professional Upgrade as a clean install to Parallels on a Macbook Pro? I purchased the Windows 7 Professional Upgade as part of the "Ultimate Steal" student discount program which requires that I own a copy of Windows XP or Vista. I do own Windows XP. I have a genuine product key and product ID.

Here's my situation:
I have 2 macbook pros. One very old (2007 macbook pro) with Windows XP Professional installed. I have the Product Key and ID but no install disc. (I lost it)
One new macbook pro (2011) and a bootable windows 7 professional upgrade iso (and have it burned to a DVD as bootable). I have an authentic product key and product ID that microsoft emailed to me. I ordered a backup installation DVD but that won't come for a few days (hence why I made the iso a bootable DVD)

So technically I own Windows XP (on one mac) and want to install a clean version of Windows 7 Professional on a new mac. Anyone know how to do this? When I try to install Windows 7 using the iso or the DVD Windows (in parallels) tells me I need a prior version of windows installed. The "Ultimate Steal" website says that there are no returns allowed and no where on the page does it say I must upgrade from a computer that has XP or Vista on it. It only specifies that I must own a valid XP or Vista license. I really hate how Microsoft makes this so difficult.


Your help is greatly appreciated!
David
Microsoft Windows 7 Professional
Had i known that Microsoft would make this so difficult I would not have purchased Windows 7, but there are no refunds.


here's an idea I had if worse comes to worse... If there isn't a solution to the above, how would I go about downloading a Windows XP Professional ISO to install using parallels on my mac (and deactivate windows on my older laptop), reinstall windows xp on the new computer. Problem is I don't have a install CD so I would need a source for a legit full iso.

oh, and I also have a normal functioning windows 7 home premium laptop if I need to use windows 7 to download anything (in addition to the 2 macbook pros i listed above)

unfortunately none of those options worked :/

parallels automatically opens and tries to install windows 7 when I open parallels

Is there any way I could get a legit iso for XP professional?

hang on, sorry about that, i just realized if i uncheck "express install" i get the options and screens I need to try the steps in the link you gave me. I'll let you know how it goes - thanks

activation was successful! Thank you very much! For the record, I did the option 1 and had to do the registry work around.

Quick question: I had to download the registry mod and open the command prompt and follow the steps; is there any chance that Microsoft would invalidate my copy of Windows 7 or for this to backfire in the future?

Thanks again guys!