How to Make Your Own Aux Cable

Just buy the 3.5 male (aux) ends and grab some wire. Speaker wire usually has 2 insulated wires bonded together, so you'll need a third for the ground. Just grab a spare wire from somewhere to use as the third. Connect all the wire to the aux ends, solder, shrink tube it, braid it, then do the same to the other end. I used 18-gauge wire and get excellent signal.

Yes, as long as the copper inside the leads doesn't touch (i.e. red to red can't touch blue to blue).

It doesn't matter, as long as all the wires are connected to the same color and are not touching other pairs (i.e., red cant be connected to blue and the red-red pair cant touch the blue-blue pair).