You're welcome, Manley. There are a couple of technical points that should be added here. One is the definition of the phrase "righteousness of God" in Paul. Wright argues that the phrase means God's covenant faithfulness, rather than adherence to God's own moral standard. as a result, when we are justified by the righteousness of Christ, he takes that to mean Christ's covenant faithfulness, not our belief in Christ, taking Christ there as the subject of the faithfulness, not the object.
The second point that should be brought up here is the phrase "works of the law." Paul says we are not justified by works of the law. What works? Wright and the other NPP guys interpret that phrase as including primarily Jewish boundary markers (circumcision, dietary laws, festivals), things that marked Jews out as Jews. In other words, the only works that are excluded from justification are exclusivistic works. So Paul (according to the NPP) is not excluding all works from justification, only some works. This is, of course, exactly the same thing that the Roman Catholic Church argued in the time of the Reformation, only they used the term "ceremonial works."