I'm trying to get a car alarm installed on my 98 306xsi. The guy from Brant (www.brant.com.au) said they have experienced problems with installing their alarm because of the car's central locking and key button unlock mechanism. Hope you understand my poor description. Has anyone else installed an alarm in their 306 or similar car? What and where did you get it installed. I am now looking at getting a mongoose MX750s installed. Anyone have the same alarm?