First off, nicely designed website. Secondly promoting inner pages is a matter of using web 2.0's, guest blog posts and other methods to link your relevant anchors to the pages you want to rank.

You can also re-structure your internal links to pass the juice from your root page to the inner pages you're trying to rank. As they most likely have low or no page rank individually.

Check out my website at www.agwebdesigner.com to get a feel for a better internal link structure.