Just an idea but,
I install car alarms and when people want their windows to work from the remote I use a module from a great company called DEI. They make all the high tech alarms like Viper, Clifford, Sidewinder, Avital and more. They also have a contract with AC Delco.
Anyway their module would just wire into the window wiring right by the switches. You basically cut the 4 window wires in half and wire this in. The cool part is it gives you ONE TOUCH(EXPRESS) UP AND DOWN OF BOTH WINDOWS!!!! This module reads the current drawn to automatically shut off when it reaches the up or down position, just like the factory module. It also has a few dip switches on the side to adjust for different resistance motors. (which means it still works for worn, old, slow motors)
This will work without any alarm, just wired into the window wires but.....
This would also be able to be wired into most keyless entry or alarm systems to roll up the windows with lock, or down with an auxilary button.
This is a very reliable company, I'm not sure on the cost but I believe its around $50.00 It's not the cheapest but it does do BOTH windows up and down.
Anyone that would like more info e-mail or PM me at anytime. I could easily provide a FIERO custom wiring diagram for anyone interested.
Sorry for the long windedness,
MOBILE
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Member MN Fieros Forever 1986 GT. Self Installed SC3800/getrag almost everything performance wise is modified/upgraded, inside and out. Over 10 years in Car Audio and Car Electronics Experiance P.S. GOT 19"s??(all the way around)