cambelt change on the cvh is a simple job m8, as long as you can see the timing marks
a timing light is a good idea and you can bring it into line via the dizzy
be sure to get the tension just right, not too tight as this can put premature stress on the belt
also note how the belt takes its route around the tensioner pulley
make sure the battery is disconnected before you try getting the crank/cam to tdc (top dead center)
its a good idea after the new belt is fitted to turn the engine by hand using a torque wrench on the crank, just to be sure that the valves arent going to foul the pistons
steps should be
disconnect battery
remove cam belt cover
bring engine to tdc using crank and line up timing marks
slacken tensioner pulley and using a screwdriver move pulley back
cambelt should now be loosed enough to remove