This paper gives a short overview about the basic steps necessary to integrate ILIAS with legacy university information system that covers almost all the tasks of the university study administration. Among others, the integration enables the existing authentication and authorization services of the university information system to be available for ILIAS. The second large group of problems concerns localization of ILIAS for the Czech language and the appropriate character encoding(s). Customization also means choosing an optimal runtime platform. Therefore, some configuration and optimization tests have been performed and their results are presented in this paper - together with some planned extensions using natural language processing tools.