im sorry i dont know of a link, but i did just see alan dunn do them and im planning to do them too!
your geletine needs to be to to warm, not too cold, or else it will pop too easily. he shaped his wire into the wing, and dipped it in, then left it to set. looked easy, lol.
you can add lustre dust to the geletine, but only a tiny bit, ass too much makes it more likely to pop.
differnt geletines have differnt instructions, just follow the instructions on the packet. you add the colour after its mied together properly. it wont show up as a proper colour though, just a slight sheen.
i dont know if u could add a bit of the gel colours, or if that would do something funny to it?