BMW 318i 91 Audio Wiring and Carpc Help - PLEASE!!!!! Stre..

Hi there,
Firstly, hello, just joined and this is my first post here. Nice group,
I certainly hope that some of you might be able to help me.

Here is my dillema. I am building myself a carpc, which I have got all
the components for. A Mini Itx P4 system alongside an 8" tm-868
touchscreen supplied with power through a carnetix CNX-p2140 which I
want to be able to set on remote start. This will then go through my
Pioneer DEH-30mp which in turn is amplified through a panasonic 2
channel m652 amp.

That was the plan anyway! The reality is that I know sweet FA about
electronics apart from the bare basics and have got myself stuck at the
first hurdle.

The first hurle was infact that the guy I bought the car off had
already patched in the Panasonic Amp to whatever connector it is that
is standard with BMW.

However, the problem I have here is that I do not and can not for the
life of me sem to find a proper wiring diagram for this connector. Does
anyone please have one?? He has wired the amp and speakers in some
funny way to this connector and I can't work out what is what. ANy help
here much appreciated!

Secondly, and also quite important. I want to be able to pulse start my
carpc so that it turns on when I deactivate the alarm. This is quite
possible but need to know if there is a connector on that block that
has that wire on it? If not...then is there one for the ignition on
there?

Failing that, does anyone know where the pulse start wire maybe
located??

I know it is not the easiest of questions to answer but ANY help would
be very, very much appreciated!!

Graciously Wishing for help - T