:state=0:jumpoff,crouchoff
That will turn off jump and crouch.
As for the other script, try the edited one below. I'm not sure whether healthless means (less than) or (less than or equal to).
:shotinhead=1,healthless=0:removehead,runfpidefault=3
:state=0,plrdistwithin=300:state=1
:state=1,plrdistfurther=40:rotatetoplr,movefore=2,animate=2
:state=1,plrdistfurther=300:animate=1,state=0
:state=1,plrdistwithin=40,rateoffire:rotateplr,animate=92,plraddhealth=-20
[b]FPSC MIGRATION: http://forum.thegamecreators.com/?m=forum_view&t=142497&b=21