In the Setup program, the user can choose their sound effect card (used for sound effects like WAVs, and also for MOD and XM music) and their MIDI music card (used for MIDI music only).
They can also choose what screen resolution they would like to run the engine using. The available choices are 320x200, 640x400 and 960x600. The higher resolution gives a better quality picture in the game, but slows the game down. Generally, use the 320x200 mode for computers which are Pentium-100 or slower. The 640x400 mode is the best choice and will work with Pentium-120 or higher computers. The 960x600 mode is currently unsupported and should not be used.
Note however, that the picture quality is only as good as it was drawn, so if all the scenes in your game are drawn at 320x200, then using the 640x400 resolution will not help - it will just slow the game down. However, some graphics cards do not support 320x200x16, so choosing 640x400 will at least allow the game to run.