I think I should point out these were not ripped from the PS1 port of Dark Forces, but were rather arranged from the original midis by Kenneth L. Simonsen, who also did one of the versions of the Indiana Jones and the Fate of Atlantis on this page. You can tell it's not the PS1 version because the opening title on here incorporates an orchestral recording of the Star Wars Main Title theme and part of the End Title theme, I think sourced from the Utah Symphony Orchestra recording if I'm not mistaken, and the PS1 version was midi the whole way through.