Well, first observation is the 5-speed. As a shop we will never do remote starts on them. Just too much room for a lawsuit.
As far as DIY alarm/remote start I would say if you have a good basic knowledge of electronics you can do it. You will no doubt be really intimidated by all the wires when you open up the box but remember a couple things. Probably about 1/3 or more of the wires will not be used. Many are for applications on various types of vehicles and won't apply to you while many other wires are optional and you really don't have to connect them unless you want. Before you begin the install gather all the information you can find for the vehicle, wire colors, size, location, how to test for proper operation of the wire, etc. Then when you do dive in and start the install just take them one wire at a time. If you focus on the huge pile of wires you will probably give up before you start.
Here is some information to get you started. First link is an install guide from Omega R&D for your car that I have dealer access to. Second one is from Bulldog Security that anyone can get. Compare the two as sometimes the info conflicts as they occasionally get it from installers that find wires in different locations or with different colors.
http://i78.photobucket.com/alb...X.jpg
http://bulldogsecurity.com/New...4.htm
Take your time and you can do it. Just take your time. You must have the right tools. Good wiring tools (wire strippers/crimpers), good assorment of connectors, and you must have a decent multimeter or test light. You should be pretty safe with a test light since your car is a little older. If you are nervous of the test light messing up the ECU or triggering an airbag get a computer safe test light or use a digital multimeter. The only time you really have to worry about messing something up is if you just start blindly poking and testing wires. Find the right wires and try to narrow it down before you just start poking, stripping, and cutting wires.
Good luck!
Oh ya, on the Omega wiring guide (the blue one on my photobucket page) any references to diagrams #200-#239 can be seen on my web site.
Quality Soundhttp://
www.c4caraudio.com/diagrams.htm