I still have this sitting on my tool box (yeah, I know I started this thread lol)
I can't figure out how to get the back panel off the trunk without completely breaking every tab.
It's a little tricky, but what you have to try and do is carefully pull the panel downwards from the trunk hatch to get the tabs on the bottom of the panel out first. The panel itself is flexible so what you should try and do is carefully pull off the bottom panel at where each of the tabs are located.
Then once those are out, you can carefully pull the top part of the panel right off from the trunk. I can't guarantee that all of the tabs will break but you should be able to save some/most of them.