Spare Wheel - Replacement for the compressor

Hi,
I have the compressor and foam. I have purchased a spare wheel and also the required accessories.
Would anyone that has completed the change from compressor to spare wheel very kindly provide instructions.
I would be very appreciative of any help. I looked at it today and I did not want to start undoing things that were not needed.
Many thanks

Step 1 is to remove the engine...