Like anything a doddle if you know how, maybe get a mate round to help who knows his way around these, you get to learn at same time.
There shouldn't be any fitting problem at all, as will be(should be) zeroed on the key(if any), if not the normal zetec pulleys have no key, but a offset slot in rear of cam, can't go wrong, belts are easy, but easy to see why they do look daunting at first, a trusty haynes manual is a good start, think of it as a big mecanno set!!
Just be aware that fords systems on parts from the reg number is not always accurate, especially around 98-02, there are two different types of rocker cover gasket used, so buy both and take back the wrong one afterwards for refund.
tabetha