Cheat Mode
If you want to enable cheats, you have to add the "cheat" command line parameter (note: that's 'cheat' [singular], not 'cheats' [plural]) to a shortcut to the application and you need to add it *outside* the quotes that enclose the application path in the shortcut.
For example: "C:\Program Files\Stardock\TotalGaming\GalCiv2\galciv2.exe" cheat
After that, enter one of the following cheat codes:
Effect - Code
Add 1 to planet class - CTRL and P
Add 10,000 BC - CTRL and M
Add battleship - CTRL and B
Assign remaining planets to major races - CTRL and L
Complete social projects - CTRL and J
Clone selected ship - CTRL and C
Heal selected ship - CTRL and H
Hail's major races - CTRL and [0-9]
Restart on new map with new race - CTRL and N
Research all techs - SHIFT and CTRL and R
Research current tech - CTRL and R
Teleport selected ship to pointer - CTRL and T
Save game - CTRL and S
Upgrade selected ship - CTRL and A
United planets meeting - CTRL and V