I can't tell from the post if you got your problem solved or not. If not there is a whole thread for this on XDA. There is a beta USCC version of arcsoft posted there. It has a snag with some users (like me), but just look at post #324 on the thread to solve the "originator address not found" problem. Even so you can have the mms up and running in a few minutes. And yes you must have picture messaging activated. My wife did it for me through her phone on the same account. Here is the link, and if you have not replaced the calender button with an action screen here is a good one I like.
http://forum.xda-developers.com/showthread.php?t=404345