Changing alarm system

Okay this is what I have I have an alarm already installed and I have figured out what wires are which. I am going to simply change to a different alarm and everything hooks up the same except for the door locks. On my old alarm there are six wires two unused (brown & white), two (purple) connected to ground, one (blue unlock common)and one (green lock common). Now on the new alarm I only have three wires one (green neg.lock, Pos. unlock)another (blue pos lock, neg. unlock)and a third (blue/red neg. 2nd unlock) This is a negative lock, do I hook up the new (green neg. lock - pos. unlock) to the (blue unlock common)and the new (blue pos. lock - neg. unlock) to the old(green lock common)? And then leave the new (blue/red) unhooked? Thanks.

Gee didn't even notice the colors were the same answered my own question if I would have read it!!. But what's the deal with the two purple wires on the old system being grounded?

It already has power locks.

well do what i said one post ago, the last line of my post

sounds like you have a relay pack similar to the DEI 451M installed; the two purple wires are a ground input for that relay pack. It basically allows a stronger ground signal to be sent to the lock wires than the hundred milliamps or so that the wires directly from the brain put out.Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

Yea I thought that the old alarm might have a built in relay. But will the new alarm work without the relay?

yep it will, just do what was said