[Koha] Importing Item Information with Stage MARC Records For Import tool

Hello, I am very new to this. I have installed koha on a test server, and have played around with it a bit. I have been able to import marc records that I have exported from our Horizon system. The system can also export item information in a 949 tag. I know that I will need to set up corresponding item status, itypes, collections, etc. but once all of that is done, how do I tell koha how to translate the 949 info into item information? Is there a howto somewhere, or some documentation I can refer to? Thanks, -- Kevin Smith Assistant Director Cass District Library AND The Fiddling Librarian: http://ashkev.weblogs.us