I've spent a day downloading ichi the killer and now it doesn't even work!! It has sound but no picture, how do I get this codec? I downloaded one not long ago too. This happends to me a lot and usally I just download a new one but this time I want to watch it now.
both/either of these should be able to play whatever you need them too including .dat files. both support .ogg also bsplayer can accept subtitles that arent imbedded in the movie file itself usually called .srt though sometimes .sub or .txt
to show file extension on xp:
start>>control panel>>folder options>>view tab>>uncheck "hide extensions for known file types."
For codecs i usually download the latest version of Nimopack, but the installation is not all that userfriendly. If you install it fully many codecs will conflict with eachother. It's usually a question of trial and error to see which one you need (and that means a lot of installing and uninstalling over and over again).
oh yeah, you may have to associate bsplayer with the format to play it. its in preferences, the hammer icon. even then it sometimes has issues *shurg* i like it becuase you can customize the subtitles, making them easier to read. and the desktop mode in neat too, have a movie as your wallpaper