[DHarvey]

First run the 2.31.coke unlocker. Once you're successfully unlocked then flash your carrier's 3.xx ROM. This basically means that it is a GPS enabled ROM.

This will also Flash and upgrade the radio. Now you're unlocked and can flash a custom GPS ROM.

Method 1:
1. Run 2.31.coke unlocker
2. Flash Carrier Official ROM Upgrade
3. Flash Custom ROM of your choice

Method 2:
1. Flash Carrier Official ROM Upgrade
2. Run 2.31.coke unlocker
3. Flash Custom ROM of your choice

EITHER METHOD WILL WORK

That's about as Plain Jane as it can get. Hope this helps and good luck.

Once you have these basics down then you can download and install the PPCKitchen and build your own ROM. I recommend starting slow though.