Okay, I got a working copy of Freespace 2 from HotU torrent, and updated it to FSO using Turey's installer. Then I tried to download the .ogg cutscene pack. Annoyingly, power outages kept making me restart the download, so after several attempts I was quite happy when the installer said it was finished... but then the cutscenes didn't play. I checked the mediavp file I downloaded and it was really small (around 45 MB) while just the intro movie (hosted here) is around 70 MB.
So I assumed the download screwed up, so I deleted the file. However, Turey's installer still assumes it's installed, so I can't redownload it. I really don't want to have to download all of the files separately. Any ideas on how to fix this, so I can download it again using the installer?