commando FM 760 install help

Thanks for the info really appreciate it. I was wandering if you can answer a couple of other questions?

I understood that the fm-760 had 2  separate channel outputs one for the trunk which i think is the gray wire and i dont know what the other one is.  I wanted a 2nd channel so i could operate the petrol cap.

The other question is about the door lock connections,  the previous alarm installer installed a new door lock motor and control module on the drivers door to insall a basic alarm how do i use that for  2 step unlock wire connections?

I have a 93 Prelude is it worth the hassle having 2 step unlock on a 2 door car?

And finally if my car's door trigger wire is BLACK/ White ( - ) does that mean it has ground switched door locks?

Thanks again for your help much appreciated.

use the second door unluck wire