BAXR6T

Hi All New to the B series and PCM, Green af, go easy Just bought BA XR6T Last owner told me it has PCM tech installed, got no idea how to access it? or what is doing or what it is... Running ForScan, doesn't seem to give me much access to change, just reading Can anyone give me the the correct program to buy, so i can access the PCM, i want access to shift changes on the BTR, Tune, Boost, fan kick in AFR, etc The list goes on Cheers