Is it okay to swap porsche head unit for aftermarket?

while on the subject of radio when i bought the S i did not get anything about my radio, i have since gotten the manual on line but i still have no idea about all the buttons under the radio head, memories (3 it seems) different setup hifi, classic etc..and two buttons dyn (dynamic i guess) and dsp (have no clue) anyone with an idea where i can get a manual for this as there is no model or make on it and it is seperated from the radio as such! (my thought is that it still must be a becker unit)

see ya!