I've just set up an email list at egroups.com for discussion on building and using these upgrade boxes. HW and myself have been fielding alot of emails with questions and I think it would benefit everyone else if they could hear the answers. The list is simply called JP1. There is a file section there too, so you can post files containing new device codes that you have built, etc.
Here's a link to sign up...
Click to subscribe to jp1
Rob.