Ok I know this has been talked about a lot, but some of them arent correct. This one works!!! Ok here we go!
First go to WoW Vendetta - Wage Your War . This is the Weapon Creator, but for the other ones go to the toolbar and put ur cursor over one of those and it will tell u which creator it is.
Ok now put the name of the item and all the other stats. And for the Display Id go to Allakhazam.com: World of Warcraft . Type in ur items name and pick the right one. Then go right under the item's info and click the link called XML. The scroll down and go under all that info. Then right under all the addresses and stuff look at the display info id. It will look like this, <displayinfo>####</displayinfo>. Put that id in the display id column. For the Entry # do w/e u want, just make sure an item that is already ingame doesnt have the same id.
Once u completed the Item click Submit. Then click Blizzard or Funserver and then click Save Item. If u dont want ur item to go public just do Download Batch right there.
So to get ur item ingame Click Dowload Batch for w/e server u running on put it in ur Server's DB. Then go ingame(u might have to restart server) and look up ur item, then use it!
I hope this works out for u! If u have any questions just post em here.