VBE mode hack for Habitual by Profuse (1997). Demo assumes mode 0x166 is
320x480x256-color and does not query modes to look for it. S3VBE20.EXE
included with the demo apparently provides that mode that way. Hack adds
an "alias" mode at that number to allow demo to work without having to
run S3VBE20.EXE.