Thanks! Will back up for sure :)

Just so others know, you will have to rename all ISO files to game.iso (in case of games with 2 discs you will have to name disc 1 as game.iso and disc 2 as disc2.iso and put them in the same folder) if you plan to play these on a real Wii via Nintendont and USB Loader GX as they won't show up on USB Loader GX if they aren't named game.iso since USB Loader GX will just ignore them. The GameCube Backup Manager will do the renaming for games with two discs for you.