you will need a scart to composite adapter and a tree way phono lead. the yellow red and white ones. make sure you get scart to composite not composite to scart like you get with xbox's and things.
rawsy's method is correct and the best way to go about it IMHO. If that fails or gives extremely poor quality you could also try a scart to component converter as I prefer that method on my PJ as it gives a slightly better picture for some reason. YMMV