Making an entity

[MrDosht]

Excellent! In which case I have another question, I managed to get the billboard into the model viewer and, even though it's upside down, get it into the game. The only problem is the billboard is separate from the water monster and is positioned precisely in the middle of the map D: how do I attach it to the water monster?

In the model editor, in Outline, attach the billboard to the monster.

How do I do that? I open the outline thing and the objects come up: waterlurker and pedobear. How do I attach them to each other? When I double click them nothing happens...