PROBLEM SOLVED!! 
(See this thread http://forum.ppcgeeks.com/showthread...=1#post1475229)
I'm on the EnergyROM Dec 31 28011, and I've had MMS working (through Arcsoft) in previous EnergyROM's, but for some damn reason, it won't work on this one. I tried JooJooBee's Arcosft, Valkyries M2.5 (and 2.1) MMS fix, I tried ZenYee's disable HTC messaging...
Someone please give me a straight answer with directions, from fresh flash to working mms. Please.
P.S.
I'm on VERIZON.
EnergyROM Leo Dec. 31 28011.
WM 6.5.3
Sense 2.5
EDIT: added more head banging smileys. This has really frustrated me!! I'm usually very patient, especially with these buggy roms, but this frickin mms thing... Makes me want to break something!!