Product Code Key for MSOffice Small Business

Hello,

I purchased Micorsoft Office Small Business Edition 2007 in Mayof this year and loaded it onto my laptop.

I now would like to load it on my desktop but have lost the back cover which contains the prodoct key.

Is there anyway I can locate the product code from the laptop?

If not is there any other way I can get the number or another number?

Any help you can give would be greatly appreciated.

Dorothy