Marketpress Categorizing Products Help

Having trouble getting a page to sort the way a client wants to within MarketPress.

The way this is setup is by model, then a category for specific parts. What he wants is to show all the parts categories on one page with headings, sorted like this:

http://knkcycles.com/suzukiGT750.html

Here is what I get in MarketPress:

http://www.knkcycles.com/shop/store/products/category/suzuki/

http://www.knkcycles.com/shop/store/products/category/suzuki-gt750/

http://www.knkcycles.com/shop/store/products/category/oem-parts-air-and-intake-s-gt750/

any help is greatly appreciated, thanks in advance!