Praise God! I was absolutely inspired and enlightened just now by that article. I have been in PCA circles for some 21 years now and have never heard a sermon on the subject of prayer, that included the concepts I just learned. I am referring of course to praying down His judgement upon them, which to my surprise I see now can lead to their salvation. I especially like this quote, because again we see the goodness and mercy of God at work:

"In verse 16 of the psalm we are given one of the reasons that we should desire that the enemy be brought down. As we pray with the psalmist, “Cover their faces with shame,” do we again wonder, “Why?” It is not out of personal hatred or the spirit of a vendetta. Neither is it so that we can gloat over their destruction. Of course not! Our prayer must be, with the psalmist, “so that men will seek your name, O Lord.” Why are we taught to pray for God’s judgment on the enemy? So that they will be converted! Nothing could be clearer from this prayer."

Thanks for pointing me to this article, Pilgrim. It has helped me tremendously! I will approach the Lord in prayer quite differently now with regards this subject.