Extra money
Enter _CasH as a town name. Make sure to hold R1 when inputting the last H.

GameShark Codes
Infinite Money Carthaginians, 801197647530
Greeks, and English
Infinite Money Americans,     801191ec7530
Chinese, and Persians
Infinite Money Indians,       80119cdc7530
Mongols, and Sioux
Infinite Money Celts,         80117c0c7530
Romans, and Russians
Infinite Money Babylonians,   801181847530
Japanese, and Zulus
Infinite Money French,        801186fc7530
Germans, and Vikings
Infinite Money Aztecs,        80118c747530
Egyptians, and Spanish

You can build roads and railroads on the ocean.
Get a settler or and engineer into a vessel, go to
the position in which you would like to build the
road or railroad. Press R.
You will gain the benefits of having roads and railroads
on the ocean of extra trade.

To get three more units follow the steps below:

1.) Activate Cheat Mode
2.) Click Create Unit
3.) Click Veteran
4.) Click Obs.
5.) Scroll down

Now you have access to three more units, Extra Land, Extra Air, and Extra Water. the ocean. Get a settler or and engineer into a vessel, go to the position in which you would like to build the road or railroad. Press R.