[Koha] Migrating Data

We are in the process of migrating our data from Winnebago Circ/Cat to Koha 2.2.9. We exported the MARC records from Winnebago and imported them in to the Koha reservoir using the web interface, but now are unsure how to move those records into the active catalog other than doing it one-by-one by using the "add biblio" feature and searching by either title or ISBN. We're hoping that there is some way to batch process them all at once. It's unclear to us whether the bulkmarcimport.pl script will do this, or just import "complete" marc records also into the reservoire. Any guidance would be greatly appreciated.