If you’re switching your Borders E-book account to Kobo (if you’re not you’d better start thinking about it because Borders is going down fast). This is the best link I’ve found and the easiest way to do it.
I’m still trying to figure out whether or not I can sync two kobo e-readers to the same account, or if I have to have two different accounts. (The don’t make this f*&king simple for readers.) But at least I’ve managed to save all my Borders Books on the Kobo Look Book.