Me and Kybou have tried our best to mod all significant stuff in the jet. We have been successful with very few ones like boot mods, some registry mods, thats about it. It is safe to conclude that modding the jet is next to impossible. Jetdroid is our best hope at the moment.
To get more info on our attempts at modding, please go through the other threads in modding section.
This one may help: http://darkforestgroup.com/forum/index.php?topic=3773.0
Read my reply in that post to summarise our attempts. We are even unable to modify the icons, so something like Sense UI is out of question.