To allow more features, XTS 5000's require a FLASHport upgrade obtained directly from Motorola. They would require your specific model, serial, and flashcode. Normally feature upgrades are restricted to the original owner of the radio.
R09 firmware was the last to allow option Q52 only for FPP, anything later then that will require both option Q52 & Q53. You CAN NOT program a R09, Q52 only, radio with CPS newer then R09 or you will lose the FPP function on the radio and it cannot be restored.
Hope this helps.