What now???

[KcLive]

While I was asleep last night my tech savy 15yr old found my phone and a few forums and decided it would be fun to see if he could flash my phone. To make a long story short...he did. I like the way it looks better now, but I am not sure what he did, and by the time I figured out what had happend he was back home with his mother. Everything seems to be working fine so far with one exception....my mms will not work at all. My text messages work, my internet and wi-fi work just fine, and so does the phone. This is on a HTC Apache (6700) that was originally on Verizon and is now on Cricket. I tried to go into the mms settings and edit it, but it won't let me. When I goto MMS Configuration under servers it shows "Verizon Wireless" and it won't let me edit it or add a new server.
Am I just stuck, or is there a way to fix this or is there a rom I can use to reflash my phone back so that EVERYTHING works?
Thanks