Security System Interface Information

My STi came with only one option: the security system.

I had a DEI Python 880xp security system added with window modules and the installer said he couldn't safely set it up so I could roll the windows down with the auxilliary button on the transmitter. He said he just didn't know what some of the contacts/wires were for or didn't know what settings were safe or something like that.. he was worried that if he hooked it up.. I might fry the window motors because they might get over-extended. Right now all the window modules are doing for me is making sure the windows are rolled up when the system is armed. I want to get this guy the information he needs so I can roll the windows down (all or part-way) and arm the system that way for hot days (using discretion of course.. I wouldn't do that at a mall or something).

Can someone please point me in the right direction for getting all the information regarding the electrical systems (specifically the windows) in the car? Is there a tech manual I can order or a number I can call where there's intelligent life that can tell me what I can do about getting this info?

Also, they were planning on disconnecting the factory security system and just letting it lie dormant because that's what they normally do. They said they couldn't do it becuase it disables too many things in the car if they had. In this case I'm totally fine with it because as far as I know the factory ignition kill system does not work unless the factory security system is armed. I also need to get them to rig it up so that when I dis/arm my after-market security system, it automatically dis/arms the factory system. They said they have done this before and it works well.