I want to give a huge thanks to all who posted/contributed to this thread. I was going insane trying to get the Uverse box working with the Elan g! system. These ccf codes were awesome. Just an FYI. I have not traced them down yet but three of those undetermined/not found codes are the a,b,c buttons on the remote. They will flash the power light on the box but wont actually do anything until you are on a menu page that supports them.
Glad I found this thread after a lot of looking all over the web.