OS X mount on boot

Hi! I have iMac with 2 users who works independently. By the way they both need to access to My Book Live at the same location. If disk mounted by finder then first user have it in /Volumes/Public and other in /Volumes/Public-1 How can I mount My Book Live for all user at the same location before one of them login? I really appreciate your support.


Can you share more information on what you are trying to do? 

If I understood correctly you are trying to map the MBL on both of the users that access the Mac. If that is the case you only need to map the MBL once.