[scrawnyb]

Since you have a GPS-enabled ROM, you want to unlock using Coke's 2.31

Once you do that, I don't think you need to do much else; but you may be required to flash a ROM onto the device.

Your radio shouldn't need updated.

In order to unlock, you need to have an ActiveSync connection established, then use the unlocker.

Follow the instructions carefully because it insists that you unplug the usb cable at one point, if you don't do it when it tells you to, the update will fail.