This is the doorused script:
;Artificial Intelligence Script
;Header
desc = Use Door (Push Open and Push Closed)
;Triggers
:state=0:hudreset,hudx=50,hudy=90,hudimagefine=gamecore\text\pressentertouse.tga,hudname=usedoorprompt,hudhide=1,hudmake=display,state=10
:state=10,plrdistwithin=60:hudshow=usedoorprompt,hudfadeout=usedoorprompt
:state=10,plrdistwithin=60,plrusingaction=1:activateifused=1,activate=2
:state=10,activated=2:state=1,setframe=0,sound=$0
:state=1:incframe=0
:state=1,frameatend=0:state=2,coloff
:state=2,plrdistwithin=60,plrusingaction=1:activate=0
:state=2,activated=0:state=3,sound=$1,colon
:state=3:decframe=0
:state=3,frameatstart=0:state=10,setframe=0
:state=5,plrdistfurther=60:state=6,sound=$1,colon,activateused=1
:state=6:decframe=0
:state=6,frameatstart=0:state=0,setframe=0
:state=7,plrcanbeseen:state=1,setframe=0,sound=$0
:state=7,state=0
;End of Script
I was experimenting, so there might be some useless stuff in there, I can't remember...
Right now, the script turns the light on when you open the door, but the light remains on no matter how many times you open/close the door.