Hi Michael - okay since you ask:
The head unit is an Alpine, with flip out screen. I did not want a separate add-on navigation unit and though I'm sure the Becker units are fine, I find things so much easier with a decent size full colour screen to glance at.. This required a little work to the dash, as the screen comes up and goes back into a space created where the centre vents were originally - though these are still retained. Basically the centre air-vents are set further back in the dash (by cutting off enough of the plastic tube at the back of the (removable) vent unit that pushes into the metal elbow-pipe behind (which is of course left well alone). This also meant the piece of upper-dash below the centre vents had to be cut away and there was a little re-trimming needed either side of the gap now left by setting back the air vent. There is an ipod docking lead in the ash tray, which also serves as a perfect little receptacle to hold the ipod itself. The Alpine head-unit the gives full touch-screen control of the ipod, including displaying album covers etc. Speakers are Focal and have been fitted behind the Porsche grills, with front cross-overs in the door pockets and rear cross-overs behind the rear trim panel. There is also Bluetooth for the phone and a DAB tuner - though this latter item is not as good as i had hoped, mainly i think because we used a glass-mount inductive aerial, as I was not happy to drill a panel for a proper one. I think the amp is a Genesis unit which fits under the drivers seat and all the av-switching is done by a box under the passenger seat. I removed the CD-changer from the boot - opening up valuable luggage space, as the ipod makes this redundant. The Alpine unit will also play DVDs and CDs, though. There is also a USB socket (for MP3 players / memory sticks etc in the glove box as well, but i have not used it. The navigation maps and software are on an SD-card, so updates of either are easy to do.
The navigation works very well and seems to have a fast processor for quick re-routing etc. It took me to Le Mans, navigating the roads around the town to get to the circuit entrance. For some reason i am always deeply confused by the roads around that town!
I got the basic idea for where to fit a screen in a 993 from Rennlist, but the others i had read about did not retain the air-vents, so I think i am one of the first to do that. The Alpine screen extends out a fair distance before it flips up, which is also an essential element of making this all work. The radio 'socket' in a 993 is really at a very awkward angle and very close to the knobs above, so you can't even go the route of fitting one of the few head-units which has a built in colour screen, as these are just too bulky - or at least they were last year.
tim
