Question about iPod install using USA Spec AUX

The one thing I did not like about the USA Spec iPod interface was being restricted to 5 playlists. I subscribe to audio & video pod casts and like keeping them video headings and accessing them directly. I don't have a desire to see text on my Business CD display. So, I am looking at the USA Spec Aux Stereo Interface Model DF-BMW and will run a line from the dash to the USA Spec device in the trunk. I'd love to be able to connect directly to the back of the Business CD Radio.

Does anyone know of another solution? I found this Interface Multimedia AUX-in BMW cable which I presume plugs into the 10-pin CD plug on the back of the Business CD. But I haven't seen a similar cable for the Z3 on any US website.

29.90 EUR = $44.00 USD
German/English picture caption translation:
For devices with on-board monitor

Allows the connection of a portable MP3 or CD player to a BMW Business CD radio from 9 / 02 and SW 8.1 in 3-E46, E39 and 5er with X5 E53 board monitor radio SA601, SA602, SA609.

2002 3.0i
Sterling Gray/Black/Black
No CDV
Clutch Stop
Dinan Strut Brace
Whalen Shift Machine
Windblox Windblocker
In-Dash Garage Door Opener
Axxis Deluxe Plus Brake Pads

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