Add a sword to unit!

How guys would i add a sword to a priest instead of his staff? If it's as simple as skinning I can do that! But please answer this question!

all depends. If you know how to alpha, alpha out his staff. import the skin into the world editor. Now, you'll need to find one of the sword models off the internet, and import that into the map as well. To attach the sword to the priest's hand, use the trigger special effect, and make the attachment point "right hand" or "left hand". It won't show up in the world editor, but it does show up in the game, so you'll need to test the map to make sure it worked. there you go.