Hey, I'm also at a loss with installing the first Dramatical Murder game.
I downloaded all the zip parts from here, unzipped them as one with 7-zip, downloaded the patch and videos for the english version, changed my system locale and restarted and mounted it with MagicISO Virtual CD/DVD Manager. All nice and dandy until now, but when I open the installer and press install the window closes and nothing happens.
The very first time I tried this it said immediately that the game was installed incorrectly and if I want to continue or reinstall correctly, although I have never ever had DMMD on any computer (or any other Japanese game..). And I did the obvious for me and said reinstall and then it closed and that was the only time it did anything after I clicked "install" from the installer.
Anyone know what I should do to make the game work, please?