The original Renew program that went through many dioceses in the 1980’s was badly flawed, not by teaching heresy but by giving omitting crucial doctrinal elements, that caused what was presented to be misunderstood out of context. It exalts the subjective element of religion, so that each person’s personal “experience” or opinion is more important that things like truth, maybe more important than God. Unfortunately it got through most American dioceses before the bishops formally examined it, and they found major problems then. In the Buffalo diocese I knew a couple people who tried to make the best of a questionable situation by trying to “baptize” Renew when it was imposed on their parish. For instance, they would take each topic that Renew was focusing on this season, and insert supplementary written materials that present the Catholic doctrine that related to that topic (which was of course lacking in the Renew materials). If you are looking for materials, besides the Catechism of course, check out Catholics United for the Faith @CUF.org. But better still, try to encourage people in your diocese to develop some other program, than trying to “fix” a flawed program like Renew.