when i bought an adapter not like that kinda sucks i bought like i year ago i didnt work as good. when i would install it, it would work pretty fine but after couple of mins it would not go to the aux mode and the sound would stutter. and after a while it does work. and i have an 04 non navi non xm ready.You would need an aux input adapter. The aux is located on the back of the radio so you would have to remove the unit to access it. You can find find the adapter on Ebay.
Blitzsafe HON/AUX DMX V.2X Acura Honda Aux Input - HOT! - eBay (item 350442494504 end time Mar-25-11 14:09:13 PDT)