Start new career for Band Hero on Wii?

I am borrowing a friend's Wii with their Band Hero game, but it has their name as the "player", and they have unlocked everything in career mode. Is there a way to create my own career without wiping their data, so I can load their user back when I return the Wii? Will this wipe all the records/scores?

I tried creating a new rock star, but that just creates one for the current player.

Solution 1:

As far as I know, Guitar Hero/Band Hero don't have a way of having a separate career for different players. The only thing you could do is back up the save and create a new one, but Band Hero's save is probably copy protected.

Solution 2:

I believe you have to create a new Mii instead of a new game character.