These are two mods for Freedom Force based on the DC Comics universe. They were freely distributed on a Web site that is now gone, so I'm posting them here. One is called simply "DCU Mod"; the other is called "JLA: Pawns of Darkness." The latter, like most ambitious FF mods, was published in episodes, and the final episode(s) were never completed.
You should install the latest FF patch (1.3) and version 2.6 of Dr. Mike Cooper's excellent FFX-squared expansion (http://www.fundamentzero.com/) before running these installers.