I've got mine firing up almost like stock on E85 in cold weather without the trigger plate mentioned above. Takes allot of time and adjusting over a course of a few weeks with different temps and what not, but I think I got it down pretty good now.
Video of my car in 30 degree garage on E85 cold start.
http://www.youtube.com/watch?v=qe3vnMSTEMI
and a thread I posted with some tables already adjusted for people to try out. Should work fairly well for anyone with an AEM. Might have to tweak a bit on it but it's well worth the effort!
Cold start and E85 calibration!