OK I've put together a photo tutorial of the installation of an iPod in my NSX. The Legend installation is going to be very much the same with the exception of the Panavise mounting bracket.
Before we continue I would like to add that I have since modified my installation to use this DIN to RCA conversion box by USA Spec sold at CircuitCity stores for appox $50.
This box allows you to connect up to 2 stereo RCA inputs to the factory head unit through the CD changer cable input on the back (the CD changer must be disconnected). The audio quality is as good as you would get through the CD changer input. Selecting an input is as easy as selecting CD 6 on the head unit and either track 1 or track 2 depending on the input you want to use on the USA Spec box.
Here's the rest of the tutorial
click here for the tutorial on LEGENDtuner.com