Can you rip a backup game (already burned game) on the usb loader?
Yes, you can with USB Loader GX. You can also play the backup disc from USB loader. I did it with Super Mario Galaxy.
if the wii recognizes it, i'd think so. try it and see. usb loader gx works pretty good for me. even if it doesn't rip, you could always put it on the hard drive via the iso, and wbfs manager. don't worry you'll have it on there in like 5 minutes (including the wbfs manager download/install)
Yes you CAN! All u gotta do is insert the disc while you're on usb loader GX or u can also use the configurable usb loader. Both work. The only problem is the installation speed. Its around 2-3 times slower than ripping a real wii game.
do you mean play the burned game using the usb loader? if so, nope you cant, try neogamma