Actually, if you're doing the HU yourself, there's a much easier way. Get a 8mm swivel socket (sears has it for about 7 bucks), a 6 inch extension and ratchet. Lie down in the pass. seat floorboard with a light and look up behind the console towards the radio, you'll see the mount screws. Just back those out and the radio pulls right out, now just get a mount kit and wire harness. Makes it much easier with those. No need to remove half the car.

As for the front speakers, if you try to pry off the grills on a 00 teg, you're going to break them. You'll need to remove the door panel to get to them. Just remove the screw from the door handle, slide forward to get it out, unplug the power lock and unhook the rod. Then remove the screw from the door handle pull and remove that. There's one push clip in the upper right to pop out, then remove the mirror trim piece on the top. The rest of the panel is held in with clips, gently pull starting at the top right and work your way around, slide the panel up (window needs to be down) and unplug, you're done.