lol, i've just found an easy way
No need to copy folders.
Just have ur normal 1 wow server folder.
Load up mdh "mangos databse handler" and make sure it's all set for your db.
Now click on MangosDatabseManagment then select realms.
Click on add, now fill in the name, and the ip it's using "different one from 1st server"
Then click edit to save changes.
But!
I've noticed that with the newer mdh updates that it realy does not like this, and says something about mangos 2 code error "I think the db needs maybe another realm added?"
But on one of the older mdh version, it lets you do it.
To downgrade your mdh click on update button, select get list and then on the left hand side, select the version you want to change to.
Im still working on getting this to work on newest mdh, and i'll let you know what I had todo.