In the meantime, to get around this hold in the program, I recommend that players use the Empty guy in dungeon screens and place an enemy spawn flag roughly at the center of the room. Use one of the empty enemy slots to create a walker with no animation or step rate, and presto! Improvised custom guy, no scripting necessary. You can even set the walker to not count as a beatable enemy so that--on the off chance you're one of those mean quest makers who puts enemies in string rooms--you can still trigger secrets. This can even trigger fireball retaliation... provided you place the enemy flag in the exact center of the screen (where the invisible 'none' guy sits) and set its defenses to Ignore. The only thing this can't achieve is an altered guy in an overworld cave.