cd changer/ipod???

hi everyone,
i just bought a USA spec ipod interface for my 99 gp/gt, and it says that i am supposed to hook it up to the cd changer port on the back of the radio (cd/eq type , factory) but then it also says that i need an AUX or INPUT button, which i do NOT have, now what i dont understand, is why they would include a port in the back for a cd changer, but no way to use it.... is there any way i can get this thing to work????? thanks

think there is a better way----iPod car adapter.
this adapter makes iPod or MP3 as a CD changer, and play iPod
or MP3 through car
audio system, it does not use FM transmitter, but wire connection.
(Plug into the CD changer port of the Head Unit). Once it is equipped,
you can choose music of iPod or USB disk from the car stereo's buttons
or steering wheel controls,
For example,
1 choose playlist from iPod
2 Select songs by Next or Previous
3 Multi Play mode: Repeat, Random, Scan
4 Charge function

I think it is useful. If anything what to know, you can ask me. http://www.shoptalkforums.com/images/smiles/icon_biggrin.gif

hey, yea, thats what i was trying to hook up to the car, but the problem was, i couldnt control the thing through any of the cars buttons, or listen to the ipod, so i ended up just buying an alpine headunit with that ipod adapter, i'm sick of my delco...

this kind of iPod car adapter is wonderful, it can make you control the iPod by the car audio such as the CD botton or even the steering wheel. its brand is XCarLink, and you can search it in google etc. it looks like as follow image:
http://www.chelebao.com/images/lsq/1ipodversion.jpg
http://www.chelebao.com/images/lsq/2iPodcable.jpg
http://www.chelebao.com/images/lsq/3ipodconnected.jpg

I got tired of the stock radio so I just installed a Clarion joyride system, now three quarters of my car is integrated into it. All diagnostics, obdII scanning, windows, door locks, navigation, alarm, audio, video, mp3. And best of all I control it by voice command.