Hex cheats:
 
 When you start a mission (at least with the Atreides), if you save it
 as soon as you start, your spice credits will be stored in byte 24354
 (hex). If you've already made something in the game, the proper
 position will not be exactly that, but it won't change much. So far,
 I only noticed a change up to byte 24344 (hex). I took the offset
 values with xe, an hex editor for dos, which I use to edit all my
 savegames. And as I said, I only tested with the Atreides.
 
 
 Cheat procedure:
 1. When the game starts, build two tiles right away. 
    This will make sure that there is only one place 
    that is needed to be changed.
 2. Save the game and abort the mission.
 3. On the main menu, press "Alt Tab", so that you don't 
    have to quit the game to cheat. 
 4. Using scientific calculator find the corresponding 
    hex number for the cash you had in the game. 
    i.e. 4960 will give 1360.
 5. Using hex editor, open the saved game.
 6. Search for the hex value. 
    Remember that low two bit comes first. So, for example, 
    with 4960 cash, hex value is 1360. But you should look 
    for 6013, instead. Change that to 'ffffaa'. 
    It will give maximum amount of cash. 
    Don't try to "ffffff", because it'll cause the game to 
    crash. "ffffee" was the maximum value I was able to use
    without crashing, but "ffffaa" gave me the same thing 
    anyway.
 7. Save the change and close the file.
 8. Back to Dune 2000 and load the game.