Sorry I haven't been on in awhile - he's some pics if you still need them.
First I cut off the old liner as close to the edge as possible (hindsight I would have left an inch that would have tucked down behind the new liner) Next I removed one bolt at a time, starting in the middle. I had a few different sized washers ready as some of the bolts are closer to the top then others. I would pick the one that, when mounted, was around 1/2 inch from the top. Next was the tricky part - I tucked the new liner behind the washer and held it in place while I tightened the bolts. I started in the middle so it wouldn't get too off-center. By any means it doesn't look perfect, but hopefully its securely in place until I need to replace the top.
As far as mounting behind the rear seat this was a little easier. At least on mine there were some pre-existing holes. If you use the same size snaps I used (I think they're pretty standard), you'll need to widen the holes a little bit. The tricky part was getting a nut on the underside of the rear seat frame as there is a lip you need to contend with. You'll want to do the tightening from below as otherwise the snap tends to twist the well-liner fabric.
The last step will be to put the convertible boot and poke holes where I need to install the snaps on it. I'm thinking of mounting the snap females on the back side of the boot (female part points up), in such a way that the boot will fold over the snaps so the snaps will be hidden.
