Well the roam only was just a test to see if I could get anything outside of Verizon's network as the phone seemed to be dropping calls a lot more than the old flip phone I had. I know there can also be a modified pri installed however, if I remember correctly doesn't that take away the gps capability? Would the simplest answer be to simply grab the latest Verizon PRL and put it on the phone with a Verizon PRI and simply not expect gps, on the Diamond at least, since apparently this only works for the Touch Pro
http://forum.ppcgeeks.com/showthread.php?t=49933