In trying to buck the stereotype of women being prude and demure, director Roger Kumble (Cruel Intentions) has managed to create a whole new cliché: raunchy, oversexed women. While the film prides itself on being a romantic comedy ''without the sugar,'' it could have done away with a lot more tired ingredients. In one scene, for example, Christina and Courtney are trying on outfits in a store when one of them exclaims, ''Do we have time for a movie montage?'' I appreciated that the writers had…