OMG Tony you legend. i have been wanting more info on how you did this and how you have yours setup is pretty much how the idrive is being setup (when dancehaven and i get round to working on it).
The nav zoom and scroll up/down is what I have planned. Unfortunatley the alps encoder I want is only available in the US - it has the added benefit of an 8-way joystick which requires a PIC to get it to work - although i am sure we could do it by hacking a mouse and keyboard. But DH wants to do fancy stuff with the lighting so that really does need a PIC.