A.4.6 I cannot use KBackup as a normal user.

Well, ehem, that's one of the dark sides of this program. :-)
I never thought of anyone else but root wanting to use this program, but you can anyway. The default for KBACKUP is to write all its data to ``/var/KBackup/''. This directory hierarchy gets created with root access only. If you want to run KBACKUP as a normal user, you need to either give him write-access to these files and directories, or copy everything to a different place and edit the ``.kbackrc'' file in his home directory to point to the new place. Of course, you also need to make sure he has write access to the backup device and that all required programs are in his path (they should be anyway, I believe.).