i bought the same cd changer adapter and it does just replace the cd changer in the boot. i followed the cable from the boot down the passenger side and managed to get it relocated into the centre console under the stereo.
the cable for the cd changer goes behind the passenger side rear quarter card, then down the passenger side by the footwell and in behind the glovebox
thats where i thought it went! thanks alot fella, will do this one night this week. much prefer to use this one so you can control it via stereo controls