Thanks Frenchie. I have been unable to flash the VZW rom because it gives me a Country ID error. However, after speaking with some friends they gave me some advice on how to use the rom without their custom install program. I think I will try that.
An interesting note however. I went to
http://www.corolada.com/prl/ and downloaded the latest "America's Choice" EVDO prl and it seemed to have fixed the roaming problem. It now shows that I am in the preferred system.
I think I will still update the radio rom, because I don't think I have an appropriate one right now.
For now, I would say my problem is solved.
Thanks guys for your help.