Try this.
;Triggers
:state=0:state=1
;DISPLAY THE TEXT
:state=1,plrwithinzone=1:fpgcrawtextsize=15,fpgcrawtextfont=Comic Sans MS,fpgcrawtextr=255,fpgcrawtextg=255,fpgcrawtextb=255,fpgcrawtextx=50,fpgcrawtexty=80,fpgcrawtext=TEXT THAT WILL BE DISPLAYED,state=2
:state=2,plrwithinzone=1:fpgcrawtextsize=15,fpgcrawtextfont=Comic Sans MS,fpgcrawtextr=255,fpgcrawtextg=255,fpgcrawtextb=255,fpgcrawtextx=50,fpgcrawtexty=80,fpgcrawtext=TEXT THAT WILL BE DISPLAYED
Works with trigger. Have you tried Xplosys TextEase yet?
http://forum.thegamecreators.com/?m=forum_view&t=181108&b=21
May be just what you need?