Hi mate, im new here but am an experienced tech and coincidently only did my st timing belt kit last saturday.

You'll have no problems regarding the vvt, its a sealed pulley and you shouldnt need to disturb it in any way.

As said in the other post, locking tools are not strictly required, use some tippex or nail varnish(!) to mark the position of each pulley, (both cams and crank) before you take the belt off and ensure that none of them are turned until the new belt is fitted. (the cams may jump slightly, use a spanner on the pulley bolt to turn it back to where you need it.)

Also, just incase your not aware, you should really fit a cambelt kit, this includes the belt, tensioner pulley and guide pulley, these pulleys do not need to be marked with paint and are very simple to replace once the belt is removed.

you will need to support the engine from beneath as the offside engine mount needs to be removed.

the water pump pulley is driven by the alternator belt and obscures part of the timing belt cover, so needs to be removed. 3 bolts hold the pulley to the pump and these need to be undone while the alternator belt is still fitted, otherwise the pulley will just spin freely.

other than that its pretty straight forward
hope that helps chief