The actual process of installing "opiumud045kuroinu chapter two v2" or similar software generally involves:
: Look for a version string in the bottom corner of the main menu displaying V2 or opiumud045 .
What are you seeing if the game crashes? Which base game version do you have installed?
If you have the base "Chapter Two" and are upgrading to "V2", look for a patch.v2.delta file or a .reg (registry) file. To apply:
: Drag and drop the extracted files into your main game directory.
Run the executable through Locale Emulator set to Japanese regional settings. V1 saves conflicting with V2 script changes.
