I have a UHF/GPS transceiver that was originally purposed as a vehicle tracker. The problem I have is that it transmits in the 460s and I'd like to reprogram it somewhere between 420-450 for use as a fox or maybe even an APRS beacon. It's interface is a 6 pin modular port on a circuit board to a 25 pin parallel connector. Can anybody point me towards a piece of software that might have a chance of being able to talk to this transceiver?