I posted a video-essay I made discussing some possibilities for using video game modding in foreign language classrooms to http://www.archive.org/details/the_sims_teach_german (Direct link at http://www.archive.org/download/the_sims_teach_german/the_sims_teach_ger... ). There's also downloadable files at http://www.langwidge.com/simsfiles.html (The Sims files are more useful for classroom teachers, the Grim Fandango for self-learners)