I have a problem with the SW Dark Forces pack from Steam.

[Darwinianevolution]

So during the christmas holydays I bought a pack containing all of the games from the Star Wars Dark Forces Saga. DF1, DF2, Jedi Outcast, Mysteries of the sith and Jedi Academy. All are relatively old games, so I expected some problems from the beginning. Dark Forces 1, however, was very well optimized, it used that DOS-box emulator and run without problems. However, when I tried to play the rest, none of them work. Dark Forces 2 freezes my computer, and Jedy outcast and Jedi academy screw with my resolution. And I can't return the games because the first one worked well and I played it for two weeks, so the refund time is gone.

Does anyone else have this problems? How can I solve this?