No pictures I'm afraid due to the very frosty weather outside that created very numb hands by the time I'd finished but for those of you who wish to know I went down the Intravee II with an Alpine KCA-420i interface. This setup replaces the CD changer with the iPod and the Intravee handles all the menus and user-interface providing you with every control necessary to play/pause/search the music on your iPod.
I'm temporally using my iPhone 4 in the system until a (cheap) second-hand iPod arrives that I picked up on eBay. The iPhone is running with iOS 4.2 and there's no problems in operation despite some other reports from Intravee customers who are experiencing problems with their iOS4.x devices such as delays and hang-ups when accessing their music. The iPod though will provide me with enough capacity to hold all my music and then leave it safely hidden out-of-sight in the car. The iPod "hibernates" when there is no activity after so many minutes and the KCA-420i provides a charging current to keep the iPod battery topped-up when you actually use the system.