im in need of alil help 2016-01-20

so what i have here is a ship in need of alil help for some reason everything i try i can seem to get the doors right on this ship well i know theres builders out there way better at the rails system then i am just not on my server so im looking for some help with them

for the main hanger door im trying to get a dubble door an for the cargo bay door im trying to get a dubble door that slides up from the bottom an down from the top then back into the floor
if anyone can help that would be awesome