You may fill all the 999 slots with images (no need to boot to the first selected image right away), and then switch them by buttons on the Gotek drive. There is no other way to exit the image loader than reset. Most games are self booting disks, so it would be pointless anyway. You may attach a display and rotary encoder to Gotek and use it to select images, instead of using loader. Now, HxC firmware supports an OSD menu to select images (it requires a slight h/w mod to the computer to plug in the video overlay).