Apparently, the guy who made this pack had some unspecific issue with some avi with only Perian installed, so rather than trying to figure out specifically what the problem was (and telling people so it could be fixed correctly), he instead tossed together a bunch of redundant, conflicting and/or broken components (not to mention the encoding components useless for playback and which are commercial trials anyways) and zipped them up, choosing different ones for PPC and Intel (even though many of the components were universal to begin with.)
He also doesn't mention system requirements: trying to install these components on systems prior to 10.4 results in many crashes.