This should answer the questions about the twist method (you can select your F-stop using the twist method. You're not locked into wide open as I originally stated). And there's a step by step method for getting 1/60th shutter locked and then the exposure compensation wheel only changes the ISO value. You'll have 1600, 800, or 400 to choose from.
Hi Kit, thanks for a very informative thread. I'm considering the T1i for a project and reading this is useful. Earlier you mentioned using FD's did you ever get that to work? Or did you just go with Nikons?