Ok this is my first tutorial everrr like evar so bear with me.
Making a graveyard is sort of like placing a portal, you need coordinates to place a graveyard.
Two ways to make a graveyard is start a fresh one or overwrite another, you choose.
First choose an id, one that hasnt been used, only do this if your starting a new GY.
Once you have done that you need to go in game, go to the exact spot you want the graveyard and type .gps , fill in the X, Y , Z.
Go Over a few and enter the Map ID you got from .gps, i think it is 0,1, or 530.
For O leave it at 0, to find the zone id you need to go Thottbot.com or WoWHead.com and search the zone, and find the number in the url address, usually at the end of the url.
Just leave Adjacent Zone ID at 0.
Faction ID is what faction can use it, you will probably want to use 3, which is for both factions
The Name is the area where you are placing it, just check the mini map.
Now go in game again .reload graveyards and .npc spawn 6491 1 (Spirit Healer), permanately.
There you go, enjoy.