[Koha] customizing Koha 2.0.0

[Stefanie Mohsennia]

Hello all,

we are still working on our newly installed Koha 2.0.0 at the
International Library in Düsseldorf/Germany and puzzled by some new
problems.

1. Where do I enter the Dewey classification information when adding a
new biblio?
2. How can I enter closing or opening days? (i.e. days that should not
be a due date - our library is closed on Fridays and Sundays, for public
holidays and for a whole month in summer)
3. When I use bulk import of MARC records into our new Koha database,
what is the most efficient way to assign each item a barcode? We are 
still working with a conventional card catalogue at present. Library 
staff started scanning ISBNs in a large ASCII file to get MARC records. 
During our "migration" to Koha, we would stick a barcode on each book 
and would have to tell the database which barcode is connected with 
which database item.

Thank you very much for the answers I got regarding the problems I was
trying to solve in March. I appreciate your support and am looking
forward to receiving answers to this new set of questions.

Best wishes from Germany,
Stefanie Mohsennia