Actually, if you look at the tacked thread in this section titled Idiot's Guide to Ipod AUX adaptor
you will find a link to a site that shows how to take the radio out.
It doesn't go through all the steps, like what adapters you need and what not, but it is a good basic instruction set with photos!
The main thing you will want on your new stereo is the Radio Shack Model: 7805, Catalog #: 276-1770, voltage regulator so that you do not hear the annoying thump when your remote turn on powers up those factory door subs. On the other hand, if you going with another amp for the door subs and changing out the door subs, this is a moot point.