You don't really need to take the dash off. If the original radio is a
cd/radio combo it gets a little tricky. You'll have to take out the center
console (piece of plastic where shifter and handbrake is) so you can take
out the ashtray. With the ashtray out, you have easy access to a set of
screws that holds the radio in place.  If the original radio is a regular
radio (dim 1), then it's a matter of pushing in little pins that are on the
sides of the radio itself. I know at Autozone they sell the little tool
needed for it.

Do a search on google for pictures and walkthroughs, they're VERY helpful!!