I did mine in my 2000 accord all by my little lonesome, it wasn't that tough. With the Crutchfield master sheet, getting the existing stereo out was a breeze. The only hard part was running the wires down the side tunnel to the trunk for the amp and subwoofer. Lots of fiddling with upholstery, etc. for that part. But the dash install was a cinch. Pics of how it turned out here.

As long as you've got the master sheet, you're OK. The master sheet is worth its weight in gold because it tells you about some secret hidden screws and how to pop off certain panels without scratching the dash plastic.