http://forum.ppcgeeks.com/showthread.php?t=48274 credit to SporkLover
thank god, the Sprint MMS app is buggy and takes FOREVER to send. I just installed arcsoft again and its working and sends picmail instantly
NOTE: you will likely lose receiving the pics directly to the phone which Sprint's app does- they will likely come the old style in a SMS link. Still well worth it IMO for the sending speed and stable app this brings.