If you are talking about an OSX DVD that came with your Mac Laptop, then no. The DVD's that come with any Mac are for that exact machine of those specs only and will not work on a different Mac model.

If it were a full retail version of 10.6 then yes, but legally unless it's a Family Pack license it can only be used on one system at a time.

With 10.7 Lion though one copy from App Store can be installed on as many Macs as you own and are registered with Apple!