[Ferc Kast]

This should be exactly what you're looking for.

void main()
{
	 string sRobe = "clothes_uti_name_here";
	 object oPC = GetFirstPC();
	 AssignCommand(oPC, ActionEquipItem(CreateItemOnObject(sRobe, oPC, 1, TRUE), INVENTORY_SLOT_BODY, TRUE));
}