It's really easy.first you need to download daemon tool and install it.after you finished installing,you'll see a shortcut on the desktop.double click on it the program openet in the down right corner .ok.now right click it and after choose virtual cd/dvd-rom,after device {you'll see a letter there},and after MOUNT IMAGE.go to the folder where the game is and select the "image" file which can be a iso,nrg,mds...extension.good luck