[Koha] librarian staff acess

Hi.. 1. I am using koha v1.2.3 on windows.How to create password for librarian staff? So that they can acess only to their part. 2. To log in to intranet interface I have to use koha as a password and as a user.How to set our own password and username? _________________________________________________________________ Using a handphone prepaid card? Reload your credit online! http://www.msn.com.my/reloadredir/default.asp