Yes, you are right, all the verizon stock roms are non gps. This is the moment were you need to take a leap of faith. since there is no verizon stock rom, once you go GPS I do not believe you can go back(someone correct me if I am wrong as I am a sprint customer). basically you can feel comfortable in knowing that once you have the nuespl on your phone, it is pretty unlikely you will be able to brick your phone. and if you do, just make sure your insurance is paid up, and let your phone have a mysterious accident
. But trust me when I say that it is a leap worth taking, and even though you can't go back to stock (I believe again someone correct me if I am wrong) you really won't care. It would be like a cripple having to give up his cane for a working pair of legs.