The problem with someone else doing it, is that above all else, few have the need/knowledge, not to mention that there is no way to test since none of us have that, and lastly it means supporting a phone/system we don't own, nor do we want to.
Obviously someone converted the phone over, there is probably a thread for people who have converted their phones, but this is EXACTLY why I tell people sell the VM phone and just buy a Metro or whatever phone, Virgins MMS really throws a kink into anything coming or going.
Worse though, you converted a year old, very low end phone to a different low end carrier. Most people when they do that, they start with a high end phone because economically, it makes very little sense to convert a low end phone to another carrier. It probably sounds harsh, but that is your situation. If you had a nice Evo, yeah, there are people who have done it and could help, but almost no one wants to do what you have done because it's backwards.
Hi I flashed my Optimus V to MetroPCS, got everything working, Data, Text, Web, Calling, MMS. I also fixed BACKside to work with MetroPCS. The ROM flashing will only fix MMS, it will not fix data/web. I can help you with the data part.