not really gone into any depth on the is but i have never seen a motor yet that had the water pump powered by the cam belt because if it did then if the pump jammed it would blow your engine possibly. normally they are accessory driven so it should be somewhere around the belts at the front of the engine
Its normally an easy job i've changed them on a cossie, a xr4x4 and a passat and its just a case of taking off the accessory drives then a few bolts and its off and as the haynes manual legend fitting is the reverse of removal unless its in a ridiculously difficult to get to place on an is then 5 hours for a remove and fit is a joke even if you did it fully with a water drain it would only add about an hour and you can get them off and on in an hour and a half the other two and a half hours must be the road test or an executive lunch