BMW alarmsystem, can I fit a aftermarket keyless system?

[Espen]

Ok here`sthe deal.

Im trying to work out some problems located in my central lockin system / double locking, in this Thread (http://www.bimmer.info/forum/showthread.php?t=21734&page=1)

I removed the back seat now, and found out that i allready have a keyless system.. It was not connected though. a big black bmw marked box with an antenna on. It was marked "GEMEL ITALY" The product number on it was 82929402527, I googled it and RealOEM.COM (http://www.realoem.com/bmw/showparts.do?model=GD21&mospid=47340&btnr=65_1033&hg=65&fg=95&hl=77) says it is an "Control Unit Alarm System" It is obviously not working, its full av scratches and screwdrivermarks. (someone have opened it and played around) And I dont have the remotes for it.

Here is the 1 millon$ question, who can find the drawing for the wiring to this box, i think i can connect my aftermarket keyless system to the alarm units wires.. At least some of them..?
I need to figure out wich wires that sends the lock unlock and doublelock signals.. I can post pictures of the box and its connectors later, just need to get home from work.

[Espen]

Well i connected the alarm controll box, and now my alarm LED is lighted up for about 3seconds when i turn off my ignition, then i starts to blink... Is the alarm armed? I tried to pop up the hood, open windows, jump the car up and down, but no alarm sounded.. Still trying to figure out what kind of antitheft module it is. DWA2 or DWA3? I found some drawings of the pin outa at e34.de.. But im not sure if its the right one..

[VentoGT]

Good luck...I have been looking for advice on the bmwalarm.com system and have gotten no response except one guy who is pissed and says it doesn't work, and 3 people who say that it works fine...I will be the guinea pig myself with this thing once I get my car out of the shop next week.

[Espen]

I went to the BMW dealer today, he checked up my chassi numer and the productnumber on the alarmsystem box. It seems like the alarm was not fitted when it was new, it is a retrofit made by a dealer 2 years after the car was produced. He promissed me to help me find drawings of the harness.

I could order up new keys with a remote, but they would be ordered on my cars chassinumber, and since the keyless/alarm system is a retrofit, the keys proberbly wont work.

A picture of the unit:
http://filserver.pyrabel.net/bilder/e34/alarm/alarm.jpg