Daniel helped me to get the game going :) The updater seemed to fail, so just by renaming (or deleting) updater_mos file the game launched (although I won't be able to update in case of a newer version, someone should pack it from me :P). The error was due to T: not mapping properly into ram: because of my setup. The error could affect also OS4 versions of other games developed/ported from Daniel, so leave your setups as intatc as possible :P