Kevin
The photos I have are all of construction of the lift panel and the installation fixture. I have none of assembly or disassembly, so to start I would suggest a dry spot where you can set up the camper and leave it that way for awhile. Prop the top up with 2x's along the sides up front out of your way. Pick a spot where there are rails meeting the frame for strength. You are going to have to pound in wedges below the 2x's to stretch the material during installation, I did anyway. Almost one inch, and that material is tuff stuff! At first I thought I made my lift panel one inch too long, but it wasn't. Plan on having help installing it.
Once you have boards between the top and lower section, note where your power wire to the overhead light is,which you want to deal with now, and you should have three elastic straps near the center hinge that pull the material in as you lower the top. Two of mine were rotted. I just cut them, as I was planning on replacing them anyway. You can drill the rivets out of the panel on the bench where there is no chance of drilling through the side liner. Drilling the rivets out of the liner, which I did during the installation, will take two people. One inside with a drill and one outside with a board backing the rivet. The power wire I left intact, I just ripped open the access hole in the panel and slid the wire out of the way.
Now you are ready to remove the lift panel. On mine the bottom hinge was screwed in and the upper needed to be drilled out as it was riveted. When installing the new panel, I used screws in the top, so do not open the holes any larger when removing the rivets. The holes were 1/8 inch. Take care removing the old panel, as you will want a reference point side to side for lining up the hinge to drill holes in the new panels. If you do not attatch the upper and lower hinges in the same relation side to side on the new panels, your frame holes will not line up.
Now you need a bench to work on. I would reccomend a sacrificial piece of plywood to work on as you will be drilling out a lot of rivets and drilling in to whatever your panel is sitting on.
When you remove hinges and the track for the upper locking mechanism, take a sharpie and draw arrows pointing up and note weather your hinges are bottom, center, or top. On the backside where they won't show. Notes on the old panels won't hurt either. It saves alot of head scratching later. Unless you write your reference wrong, which I did on one hinge. The rear panel can be used as reference also, mine were mirror images.
Gotta go, this will get you a start. Also, I had a local lumber yard rip some 1/4 birch panels to width for me. I had to get them home in a Ford Focus. I do not remember the widths offhand. I will look up my notes and get back to you.