Alright everyone!
All the pieces have falling together for getting ArcSoft to work for MMS on the Sprint TP!
http://forum.xda-developers.com/showthread.php?t=473296
So putting it all together:
Make sure the Sprint picture mail app isn't installed.
Install the attached CAB, then you need to edit the registry:
Change HKLM\Software\Arcsoft\ArcSoft MMS UA\Config\UI\EnableServerEdit from 0 to 1
Now we need to change some settings in the Pics/Video Options (under Menu) in Text Messages in Pocket Outlook.
Tap on Sprint in the Servers Tab.
Change where it says Connect via: from The Internet to Sprint.
Now receive will work.
If you can't send an MMS change the server address from
http://mms.sprintpcs.com/servlets/mms to
http://63.215.195.152/servlets/mms