Форумы / Cotonti / Skins / Smilies

to change and add the smillies goto \images\smilies\ .There you will see the smile files and the set.js.

{
		name: "smile",
		code: ":)",
		file: "smile.gif",
		prio: 60,
		lang: smileL.smile
	},

I havent tried it by myself but i thing you just need to edit the set.js to add and change the smiles.