I think jamesr10962 wants to move an existing Windows 7 installation to a new system without reinstalling. I would recommended a clean install. I know people have moved their drives but I believe you still need to reinstall the application to make them function and you will probably have to repair the OS. If you have to do that what's an extra 20 minutes to install windows?
If that's the case, I agree, a clean install is needed. His current installation won't have the necessary chipset drivers and possibly other drivers that are needed to run optimally. Not to mention that a clean install will help remove registry bloat.