Step 1: The Speakers
First you are going to have to take the speakers out of the casing. For me I had to cut the wire an pull the trough the head set, and re solider it back the connections to the speaker.
The actual speakers of mine were glued into the plastic piece that the foam cover goes around. I kept it on the speakers would have space for the sound and so I would have extra padding.
Also it helps if you get head phones with the cord on one side.