Nice gift! When my family gives me stuff, I usually gets socks :)

On a 95 integra (probably similar to a 96 civic) you have to take the
center console out. This is not a big deal, loosening a couple of
screws on the side panels and lifting the whole thing over the stick.
This gives you access to the bottom of the factory radio. There are a
couple of screws near the rear of the stereo you have to loosen. It
then slides out of the front.

Unless you really like jumbling and cutting wires, you may want to look
into getting a cable for your civic (cruchfield.com sells them). It
will let you hook the new stereo on the kitchen table to this connector
and slide it in when you have access.
(I did my Altima in literally 10 minutes this way).

Remco

You'll need Adobe Reader for this.

http://www.installdr.com/InstallDocs/Honda/PDF/466013.pdf