Typically these files have extensions such as. What this software does is create a virtual CD/DVD drive with which to 'mount' and run disc images (1:1 copies of the original game disc converted into a large data file). Make sure you have both the game data discs and the most up to date translation patch from the translator's blog. See here for the /g/fglt/ guide to installing visual novels on gnu/linux.
Ensure your system is properly set to Japanese system locale for non-unicode programs.
