If they have long, funky names, you got them from the download of a lot (or possibly a sim, I think sim-related CC can get dumped there too).
You can also get those names if you use Delphy's Sims3Pack Multi Installer. I ran a bunch of store Sims3Packs through that and have over 2000 funky ass named CC files now.
Yeah, that is exactly what happened. Is there a mirror for a Merlin download anywhere? I keep getting linked back to TSR and it's a broken link.