Is it okay to swap porsche head unit for aftermarket?

[Loper]

So has anyone successfully replaced the head from a 987? Just got mine a couple weeks ago and already miss the ability to play MP3s and wouldn't mind adding on a slide-out nav system while I'm at it if I'm going to spend the cash.

But Crutchfield has the car as "not researched" as yet, and I am not familiar enough with the high-end installers in this area to know who to trust, of even if the kits are available yet (from anyone) for the 987 in regard to wiring harnesses and face plates.