On how many PCs can i install one license of OD ?

On your home computer and on your work computer.

Also, get sdc so it'll remain up to date, and save an installer.

Thanks DR,

you said i should use SDC (Stardock Central) to install it ?

A good resource:

https://www.stardock.com/support/software_eula.aspx

Yes. Also, periodically save an installer which you can get from the store: https://store.stardock.com/login.aspx?ReturnUrl=/myaccount/products

I read all that but have another question. I'm going to partition my hard drive and have win 8 on one and my 7 on the other as it is now. All the newest programs like Start8, etc will only be going on the win 8. however I'm going to need windowblinds and skinstudio on both. When I'm ready should I contact SD and advise them?

You'll be fine, Dave....it's still the one computer....;)

Thank you Paul