You have to install the game (and depending on the version of the game you have the update118 patch which can be downloaded from the digital cute website, just run the exe after installing the game and it will update for you) and then copy the extracted English patch files into the musumakerhd file which, unless you installed it elsewhere, should be inside the DigitalCute file inside your program files (replace all duplicate files with the version in the english patch. Then launch the game using the english.exe file inside the game file don't launch from the .exe with a Japanese name that ins