The backwards of Liverpool is disastrous, even with a good goal-keeper. Houllier should let Hyypia and Traore to take a rest. Riise can play left backward (or try Vignal), Babbel can play the right, Henchoz and Carragher can play central backward, or even Xavier can play the central too. No more Diouf, use Owen and Baros to be in front, and Smicer at the left wing.
Houllier has a lot of players in stock, just try to use them!