The Louisville Institute's mission statement is found at the link below. In a nutshell, they bring together leaders of American churches of every stripe (Protestant, Catholic, etc.) in order to come up with a vision for the future of Christianity in America. An interesting project for an IFB pastor to be taking part in (and accepting money from).
There are many other churches in very close fellowship with Lancaster Baptist, and with Lancaster being the biggest player in this group, the others are likely to follow its lead. I am personally acquainted with one fairly large IFB church (about 500-600 members) that, like Lancaster, is now adopting "conservative" versions of popular CCM songs. I haven't read all of David Cloud's material regarding this as I'm already familiar with the situation, but this is probably one reason why he didn't approach Chappell personally; the issue affects more than just Chappell's home church.