You lot make it sound so easy 
So I mark up all pulleys with tipex, on the pulley and on the engine?
Do I need to get under the car or can it all be done from above?
You missed out one crucial step, you can only do it in your pants or it will never start again. It was some experimental technology for the spanish and italian markets to cope with the hot garages, it was used on red 8vs with digi engines only.
Oh sh!t, I never even knew that!
I tell you what, I'd be completely lost if it wasn't for the helpfulness of the members on this forum.

Seriously though, would I need to get under the car to do the bottom end pulley?