[Koha] Owen can you help?

Owen We are about to go live (next week) with 3.0. We would like to add database links to our OPAC. We have gif of the buttons and the links to the sites but I don't know where to put the gif and hot links to show up in the OPACNav. Can you give me a suggestion? Also we are interested in adding the "book covers of the most popular books" to our OPAC page and Bev said you did the dev on that for NPL...anyway to co-op that for use by other libraries? Lee Butte Public Library Butte Montana