I'd thought about his a while back...
[some fiddling in process]
;Artificial Intelligence Script
;Header
desc = Use Door (Push Open and Push Closed) Enemies can open door
;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:activate=2
:state=10,activated=2:state=1,setframe=0,sound=$0
:state=10,anywithin=60:state=1
: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
;End of Script
Try that and see if the enemies can open the door. If it works, then I'll maybe see if I can get the enemy to follow the player through.