Need hint: how to remove Back Door (Hatch) main trim?

So I'm removing the hatch trim in preparation for installing my backup cam. I've got the skinny/top part off, and the two top side bits. But the largest plastic covering the bottom half is not coming nicely. I see a slot on each side and the pantomimed photos in various Toyota docs indicate there is something in there to push... but I'm just not getting there.

Any hints on removing the bottom back-door (hatch) trim?

Thanks much!
Pete

 

Thanks, all. Dan's Ottonavi install looks helpful in other ways (eg how to get the mic into the overhead)... unfortunately none of the links actually demonstrate removing the hatchback cover. I'll shoot photos once I get it done.

Sounds like the main thing is that for this job I really do need t pry tool. I'll go get one and try again. (Now that I've done it a couple of times, pulling off the plastics around the HU is quite easy with my fingers... )

 

Did it. Thanks, all!

1) I tried several local auto parts stores. Amazingly, nobody carries the plastic tools anymore, not even Pep Boys (noted recently in the backup cam thread.)
2) The PC Slot 'cover' is a perfect tool: right angle bracket locks into the side slots quite nicely and helps give me a finger hold.
3) PaJa is 100% correct. Once you are able to pull the panel away enough to get fingers in there, it is simply a matter of yanking with enough force.

It does still require a bit of care. On my Prius there is some insulation in there and one piece got slightly caught... it was starting to tear as I pulled the trim away. Doing it carefully, I watched and listened and stopped before any damage was done.

Again, thanks everyone!