Complex sentence: He appointed Stephen Zápolya captain-general, Urban Nagylucsei administrator of the Archdiocese of Vienna, and entrusted the defense of the occupied towns and forts to Hungarian and Bohemian captains, but otherwise continued to employ Emperor Frederick's officials who accepted his rule.
Split into simpler sentences: He appointed Stephen Zápolya captain-general, and entrusted the defense of the occupied towns and forts to Hungarian and Bohemian captains, but did not make changes in the administration. He even continued to employ Emperor Frederick's officials who accepted his rule.