This cheat is for the VGA version.
edit the 4DBMCGA.EXE file and change the following to enable cheats:
search for 83 C4 04 0B C0 75 72 C6 06 84 0B 01
change to -- -- -- -- -- EB -- -- -- -- -- --
search for 83 3E A8 08 00 75 04 0E E8 A5 3C
change to -- -- -- -- -- EB -- -- -- -- --