Is it possible for the dealer to retro fit DSP.

Thinking about getting a X3 3.0d M Sport one available with all my options but not DSP asked dealer if it was possible to retro fit this but he's not sure

Reading the site it sounds like this could be possible but I'm looking for the dealer to do it along with a icelink (whatever that is ???) for my ipod.

Anyone know

Thanks
Fiona.