Hi Bill,
I've only been under the hood of about 6 or 7 laptops. And the fist few, I did the same thing as you have....look for screws and take 'em all out and the laptop still wouldn't come apart. In my limited experience, its always been the keyboard that "pops" out or slides off or unclips or something, sometines without removing a single screw, to allow access to the innards of the computer. I have not opened a Toshiba though.
I know this next part will go in one eye and right out the other....but I thought it should be said. I don't consider myself a genius, just methodical and persistent. I was able to figure all of this out on my own in about 15 - 30 minutes the first time. Perhaps if you haven't been able to get the bugger open yet, you should take it to someone that has been trained to do this stuff.
That said....if I were you, I'd try it too. ;-)
Good luck! ! Caution !
All letters typed above are the direct result of staring at computer screens for extended periods of time and the consuption of massive quantities of caffeine. Beware!