[Ask] How to change Treasure Chest model to Guardian model

[schokoramell]

yesterday was my first time farming in hall of abyss. i misteleported on the chests frequently because of how small it is. is there any easy way to change the treasure model into guardian so that it's more visible. i play on official server. and I only know how to do simple edit with grf & act editor. 

[Moooooon-Aisha]

Copy guardian model, rename it to treasure model, then drag/drop it into your grf to replace older treasure model.