There is not a way to make Sense auto rotate using Gsensor... I don't think anyway. I used to include an app called Flip_it, for that reason, but I soon came to believe that having most things auto rotate was more of a nuisance than a help. So I removed it from the ROM. The app allows you to set certain programs to auto rotate or not and also allows for rotation to specific angles only. I explained it a little bit in this post:
http://forum.ppcgeeks.com/1912347-post391.html
The cab is attached. Try it and you might like it. You'll have to play with it a bit and set it up to you do what you want and not do what you don't want. But once you get that set up, I think it could be useful to you.