Treasure Chest Offset

I'm trying to make a monster-in-the-box with FF6LE (Map Editor), but it doesn't seem to work correctly. It gives me the default Lobo monster (pack number 0) inside the box no matter what number I place in the Monster Pack Number. Same thing happens when I place existing pack numbers, its always Lobo as the monster. I remember seeing a list of Treasure Chest and their offset, does anyone know where this document is located? I can't seem to find it after some searching. If not, does anyone know where the Treasure Chest offset starts and/or finishes?

Edit: I was the problem, I was using the "random monster" pack numbers 0-255. I was suppose to use the 256 to 511 pack numbers for from what I've seen "special event" or non-random monsters, it now works as intended... This thread can be deleted.