I don't have a guide but it's pretty easy to do. Take it you have a delete pipe to go fit? From memory tthere is 5 or 6 bolts and an electrical plus. I know one bolt goes right through the asv and egr. The only problem you will find is removing the metal pipe that connects to the egr. I had mine removed the same time as the dpf and he had to chop it in half to get it out. You will also find it will throw a fault due to the egr being disconnected.
Or you are removing, cleaning and putting it back and I've just written that for nothing