These are the only pics I have taken thus far.. It's the finished product.. I'll take some more tomorrow of the foam that I used, and the vinyl material that I used as well.. The main thing is that you take off the existing seat covering by pulling all the staples from the underside. After that, just trace an outline of the old material onto the back of the new one so you can cut it out. I went a little bigger because I was using thicker foam than was on originally.
For the passenger seat, I didn't change the foam since I'm not carrying passengers anyways so I don't care how it feels

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I don't know what your seat's going to look like under the vinyl, but there's 2 different foam pieces on mine. The top one is more of a cushion to the bottom one which is a very hard material. Now, what I did there, is using a razor blade I sliced the softer upper layer off, and then made a new one out of the foam that I bought. On mine, it's a little thicker than stock, but that's ok, that's what I wanted.
Anyways here are the pics of the finished product:
