Don't hold me to this, but there is an install kit in addition to the CD changer itself that should have the instructions with it. Actually this page sells it and has the instructions in PFD form:
http://www.handa-accessories.com/insight.html
I put my Sirius brain in the cd changer spot and ran the cable to the head unit through the CD changer wire channel, it was easy to do. You might also look in to a universal aftermarket add on cd changer. It should be the same unit used in other Honda's, or at the least the CD changer used in the Insight is the same as the S2000.
http://www.handa-accessories.com/insight.html
I put my Sirius brain in the cd changer spot and ran the cable to the head unit through the CD changer wire channel, it was easy to do. You might also look in to a universal aftermarket add on cd changer. It should be the same unit used in other Honda's, or at the least the CD changer used in the Insight is the same as the S2000.