I too had hours from previous training (28.5 Hrs) back in 1999 and they certainly do count towards the grant of a PPL. As mentioned previously It is almost like starting again after a lapse of continuity due to time since you last flew.The only advantage is that if you have any solo hours you don't have to do them again and it gives you an appreciation of how an aeroplane fly's and handles. It took me another 60 Hrs to pass my PPL last year 2007 but saying that it was learning in a different aircraft type. Enjoy every minute of your training and welcome back to the left hand seat.