I don't know if this is the proper section to post this in, but I've made some programs that will let you manage your Xenoblade save files. If you combine this with a modification to Dolphin that backs up your save file every time you save, you could get a record of your save files in case you ever needed one of them.
http://www.mediafire.com/?9jdbd1xwmi6gw
http://www.mediafire.com/?9jdbd1xwmi6gw