Basicly what this is ment to do is to add the 3.3 items to your data base, like as if you were at patch 3.2.x and you just updated to 3.3.0 and you don't have the 3.3.0 items in your data base this is what its for.
If you want to use it on Trinitycore, then just use it. Trinitycore and MaNGOS use almost the same type database. It sould work for trinity core.