PCMaximum Spice Cheat:
When game starts, build two tiles of concrete right away. Save the game and abort the mission. On the main menu, press Alt+tab so you don't have to quit the game in order to cheat. Use a scientific calculator to find the hex number for the amount of money you had in the game. i.e.4960 will give 1360. Using hex editor, open the saved game. 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 'ffff'. It will give maximum amount of money. Save the change and close the file. Go back to Dune 2000 and load the game. If you followed the insturctions correctly, you wil recieve maximum amount of money. Now destroy the enemy!
Thanks to Revolution readers jermz and Bryan!