I just did this process and took photo's of the whole thing. Lemme upload them and I'll see if I can help.
Ok, here is a pic showing where the inside cable attaches to. It's the blue one and you can see it if you crawl into your foot area on the driver side.

Take that one off, as well as one that is under the hood next to your master cylinder that looks similar just black. It's on the firewall. At that point, the whole thing should slide forward.
Then you've got a bunch of hidden screws. (don't pull it forward too far or it'll be a pain in the ass to get the cables back on the hooks.)
This should help with any hidden screws:
Top screws:

Bottom screws:

Back screws (those hold in the nobs and whatnot, they still need to come out. I almost broke my HVAC trying to pry it apart because I didn't realize these were here):

Then it should pop apart and look like this:

I've got more photos on the process in this album:
http://photobucket.com/led_install_94_celica
This post has been edited by RabidTRD: Sep 30, 2011 - 10:09 AM