For those of you that continue to have problems with Sprint's crappy a$$ pic mail app, give this a try:
http://forum.ppcgeeks.com/showthread.php?t=59412
It's a version of Arcsoft that is incorporated into the regular threaded sms. It works great. It's super fast both sending and receiving and the pic message is kept with your regular threaded sms conversation. This is how pic mail should have been done to begin with.
