hello

hello to all, i have just bought a td4 2002 and am allready beginning to regret it, doing 60/70 power loss and smoke, as it's been a bit of a dream car for me i want to try and sort it out, no warranty on it(stupid i know).
i have read the best place to start is the fuel filter on the wing and have read about a cd called rave, can anyone tell me how to get a copy,
many thanks
billy