I cannot answer all as I am still learning alot myself. What I did is do a general search. Most of these could be answered that way. AS for  
 
1. set it in rules variables which expansion settings to use.  
2 yes it will. 
3 i believe you have to replace the new skele file in the zones with the old ones.  
4. not sure but probably much more work than you want to do. 
5 if you follow the NPC creation guides(there are multiples floating around) you will not have to respawn them each time and they will spawn when zone boots up/whenever you set spawn times for. the main command here is #npcspawn create 
 Like I said I do not know alot, however a simple search might help next time as you will find your answers sooner than waiting for someone to come in and link them 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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