The cam can be installed with the engine in the car all you need is the valve
cover gasket and a good torque wrench... The belt is not as easy as you
would think... Check the library for belt replacemnt, came up about three
weeeks ago, the big issue is that you need a copy of the special audi tool
that holds the crank/balancer... The computer and spring is a 10mm wrench
and a phillips head #2 and about 1 hour at the most... Do the computer
first, then see if you even want the cam...