So youve sussed out the ride height bit?
To change the rear sprocket carrier you need to undoe the big nut. Can be done easist (without air tools) with the rear wheel on the ground. Loosening the nut before taking the chain off helps.
If you are using the same chain with a new front sprocket and a new rear carrier, are you going to change the sizes, number of teeth?
To adjust the chainall you need to do is undoe the two bolts on the rear of the swingarm, then using the big c spanner in your tool kit turn the castle flange behind the rear sprocket.
Again looking at it from the chain side of the bike, to tighten the chain, turn the castle flange anti clockwise. and vice versa to loosen. thus keeping the 5p piece in the lower half of the 10p piece! still in the game?