Hello,
I have a couple of suggestions - Which may or may not be helpful - As you're posting this in a forum that is more public and less "corporate" in regards to the people that view/reply to these forum posts. You might need to become a "Microsoft Partner" - There is a "community" section there as well that may be more useful then these "support related" forums. You could also check out this Windows Hardware Development "Device Enabling Kit for MTP" - There is an email on that page which gives you access to someone who can help you with MTP development.
In Christ, Trav...Samsung Focus WP7 - Zune HD 16GB - ASUS ROG G73JH -