I was able to do a quick test using the settings in entity .fpe:
;Animationinfo
animmax = 2
anim0 = 0,30
anim1 = 10,11
and simple script
;Artificial Intelligence Script
;Header
desc = Door start open
;Triggers
:state=0:setframe=1,state=1
:state=1:incframe=1,state=2
:state=2,frameatend=1:state=3
;End of Script
Definitely starts the door open, you can add this to whatever script you are using and change the states accordingly thereafter.
Do not however change state=0 in the original script as this would be your hud creation and requires this state. Change this one instead.