GCMUtility is a tool that can reduce the size of GameCube disc image files. It can also create multi-boot images of multiple GameCube games.
User guide
- Click the Add ISO button at the top to insert an ISO image into the main window.
- Click the check box beside the imported game.
- The "Shrink" button at the bottom will now become enabled. Click it and select the name and location to save the newly shrunk image.
- (Note: Shrinking is only possible when there is a single game with a check mark activated.)
- Continue adding ISO images.
- Once you have two or more checked, the "Generate Multiboot ISO" button is activated. Click it to create the ISO.
