Will be optional with the prologue patch, which will be released sometime this month.
EDIT: Can someone knowledgeable about codecs recommend an efficient format in terms of filesize and quality to encode the OP in? The original is an mpg file. The game engine only reads mpgs [though for some reason, if you change an .avi extension to .mpg, the engine will support it]. Right now, the output file I’ve decided to use is an .avi file with the xvid mpeg-4 codec.
Someone point me to an encoding program which supports mpg file inputs and mpeg/avi outputs, and can read .ass subtitles. I’m using VirtualDubMod at the moment, and I’m not too impressed with the quality and filesizes.
NOTE: .mkv files are NOT an option. I’ve tried that and it fucks up the engine.