[Koha] adding target catalogs to search engine

Hello Koha, Two questions: How does one add a specific library catalog to the search targets, that isn't already there? Also, does anyone find that they regularly get a response from NYPL's catalog that holds a record but says "system error" as the holding? Thank you! Caitlin McGurk -- Caitlin McGurk *Librarian The Schulz Library The Center for Cartoon Studies <http://www.cartoonstudies.org> McGurk@cartoonstudies.org*