Add things to Database

Hey I was wondering the following:
I have a 1.12.1 server and I want to add some weapons from Burning Crusade or something to my database, can anyone help me with that?

Good question to be honest.. I would also like to see an answer to this one.

i think u cant add the items of BC to a normal wow..

The client holds the graphic images, and will limit what can be done. You should be able to add new items to your database with no difficulty, so long as you use only the attributes/stats and models that are supported by the client.