Program selection
There are 4 inputs on the I/O connector CI0 to CI3. CI0 is the LSB. There are 16 programs available (8 if you have 2 cameras), so I think you just dial in the binary equivalent. The program selection takes 230ms and the BUSY signal goes high as its working.
The I/O connector is ordered extra, if you don't already have it, and the colours you need are red, orange, yellow, green for CI0 to 3 and the busy is one of the white wires.