Just a wild guess:
if 8015475A -> 4098, then
((CODE - 80154747) < 3) + 4000 = Script Address (all in hex)
Therefore 80154768 -> 4108
So try something like:
12 60 20
11 08 41
80
60 XX
90
to change a character's "gamma" (which I think this should appropriately be called).
02 60 20
01 08 41
80
that will retrieve the character's current gamma if you want to use that. Remember that this is a guess. I haven't tested this address yet.
PS: Something that I've seemed to notice. In LKM's
video of my Red XIII mod, you'll notice that Red grows very large, then doesn't shrink back once he's grown larger. A weird bug occurs where he stays large, then gets larger again and again before shrinking back again. I think this is because the command 92 automatically ends the script. I'll test this later, but I think this is the case. This was previously undocumented so I'm a little surprised by it.