Chicken Carry and Water Maze Script Help

[E_Man]

I was to make levels in offline editor but I can't do a water maze right, this is what I have:

// NPC made by E-Man
if (playerswimming) {
playerx=31;
playery=42;
}

It only works if I start in the water. Also I want to know how to how to change the carry gani of an npc so I can carry a chicken because when I try to carry a chicken, it looks like a person, and I can't use "replaceani" or "replacecharani",