BETA 127 with 2009 activation key still active - HOW TO UPGRADE

Hi,

 

I'm using windows 7100 - and NIS beta 127 - i now wish to use the retial version with my still active 2009 key.  How do i do this?  I don't want to have to give my CC details for the opt out trial, and 2009 doesn't install on Win 7!!!

 

Any advise would be greatly appreciated!