Run One Copy Of MS OFFICE 2007 on TWO OS'S

Hi,
I am asking you all to please help solve how i can run one copy of ms office 2007 on two os's

I'll explain........
Well, On My laptop, an Extensa 5220, i have running Windows Vista, No SP's, and Windows 7 RC 1.
I need to find a way to run MS Office 2007 in Windows 7 as well as Windows Vista ( where it is installed )
I have tried Opening it from the main folder and it comes up with:

"Microsoft Office has not yet been configured with this operating system"


All Hep Accepted,
Yours,
cjpipod