The blower motor is behind the glove box door, here's a picture of the assembly.
The only tricky part really is to make sure you don't screw up the glove box light, I've done it and if you do, the light will stay on and drain the battery. It took me over an hour just to get the light assembly back together. Glove box removal is fairly straight forward, a couple screws under the cap on the passenger side of the dash, 3 screws or so under the glovebox at the bottom of the dash, and a few screws inside the glovebox. I think there may be one hidden on the left side of the box hidden under some of the console plastic as well that's kind of hard to get to. You may be able to move the glovebox out of the way far enough to get the blower out without removal of that screw. Beware if the motor is burned out the resistor pack may have bit it as well. It's located in the same general area and you can check it for opens with a multimeter.
Thanks for the bonus and accept, disregard what I said about the resistor pack if your fan currently works on all speeds I didn't see the part where you said it was just squeeling on slowdown.