what alarm are you installing and have you put an actuator on the drivers door?
i have done many of these cars with an alarm and as soon as i get my one i will b putting a Mongoose M80AU in it
from memory you should have
a orange, blue, brown black, white , green, purple, and a yellow wire
now if u have put a actuator in the drivers door all you need to do it apply power 12V CONSTANT to BOTH orange and purple *they should b the fused ones* then connect the brown and white to earth and then the blue and green will be your lock and unlock wires for your actuator.