Benhar,
To remove the old one, just place your fingers up in between the front of the upper console unit and the headliner (up by the windshield), then pull down.. it will feel like you might break something but will eventually unclip. Some people lose the little metal clips up on the mounts but that didn't happen to me. Then just pull out the console unit and unplug the DIN.
Plug the new one in and pop it back into place...