no it may not be rocket science, that's provided the circuit board isn't too wide. Also the remote buttons may be too close together compared to the flip shell button pad.
As for what i do, i do mobile car key cutting & programming. Not just with VAG but with most cars which includes supplying of the keys/remotes. I mainly use advanced diagnostics equipment but i also have genuine ross-tech vcds & nfair few other different make specific software
Then on top of that i do mobile remapping & general servicing, fitting stereos, reverse parking kits etc
oh & prices vary depending on type of key & how far i have to travel. Generally for the earlier VAG remotes i charge £90 to supply cut & program a new 2/3 button flip remote within a 10 mile radius. Some remotes do cost a little bit more depending on model & year. Like with the majority of the newer canbus VAG vehicles it isn't as simple as just reading the SKC & programming the keys with it. You have to precode the transponder with data from the immob before it can be programmed to the car with the SKC & there isn't that many different bits of equipment available to precode transponders. Advanced Diagnostics equipment does precoding equipment but it's not cheap