I don't know how to make an INI file and find out all the offsets in order to make Leaf Green compatible with Advanced Pokémon Icon Editor. To locate the icons in Tile Layer Pro, Goto offset 00D30200 for Gen I Pokémon, 00D98C00 for Gen II Pokémon or 00DDD600 for Gen III Pokémon. I personally prefer playing the secondary Pokémon versions (i.e. Blue, Sapphire, Pearl) for some reason.