Actually, I think I might have just found a quick fix for you.
Add this <collisionbox: DEFAULT>
in a comment on the event and it will work. Basically, this section of the code:
COLLISION["DEFAULT"] = [8, 12, 16, 10]
COLLISION["BOAT"] = [4, 4, 24, 24]
COLLISION["SHIP"] = [2, 2, 28, 28]
COLLISION["AIRSHIP"] = [4, 4, 24, 24]
are presets. You could add another if you want custom collisions by simply adding another following the same format right under the last one.
This:
<collisionbox: x, y, width, height>
should also work, but it doesn't and that was my problem with this script earlier. It always give this error:
(https://rmrk.net/proxy.php?request=http%3A%2F%2Fpuu.sh%2Fb6r13%2Faa6bdca0a8.png&hash=99350c8299103c61d5deb6c9ccc7084b129f74c9)
But for now, the above fix should be good :D