i'm a bit confussed as to what you trying to acheive? 
do you want to use old version or new version? 
nektulos.s3d = old version 
nektulos.eqg = new version 
 
you say you end up in "wrong, unfinished zone without an exit to East Commons."  that sounds like new version to me. 
Then you say "I need a way to disable the older zone completely..." 
 
 
if you want the old version, then rename/remove the .eqg, that will force it to load the old .s3d version. 
 
if you want new versions, then it will take a bit of work, i use new version, which now all works, and zones into and back from all zones (L/S (new) - Commonlands (new) - C/C - PoK - Neriak) also make a zone over into neriakc through unused cave (made it quicker for my necro lol) 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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