I came accross this website while searching for the override function. Apperantly they sell hacks for the NAV system to automate the "I Agree" screen, use the full Bluetooth functions of the phones (automatic override) and even unblock the video capabailites using external source like video ipod . Even though TCH is not listed, other toyota models including prius are listed. I have sent them an email inquiring about the TCH, and have not heard back yet, if and when I get a reply back I'll post.

http://www.coastaletech.com/DELUXE_LOCKPICK.htm

Just wondering, what you guys think.....