Most of these codes are activated by editing the CSTORM.INI 
file located in the MissionForce: CyberStorm directory, and 
adding a line there that causes a new menu item to appear.

Steps:
 1) Run your text editor
 2) Load CSTORM.INI from 
 3) Type This in your ini file:

Code: I'll Buy That For A Credit
                          Available: on HercBase screen
                          Function: Get a single credit,
                          for the extreme penny pinchers.

Code: For A Few Credits More
                          Available: on HercBase screen
                          Function: Get 1,000 credits

Code: Credits From Heaven
                          Available: on HercBase screen
                          Function: Get 10,000 credits
                  
Code: I Need More Wheat
                          Available: on HercBase screen
                          Function: Get 100,000 credits
                          Reason why this code exists:
                          Too stupid to tell. Don't ask 

Code: It's Good To Be The King
                          vailable: on HercBase screen
                          Function: Get Mega credits

Code: Heal Me
                          Available: on HercBase screen
                          Function: Repair all Hercs and
                          pilots

Code: I Don't Like Those
                          Available: on HercBase screen
                          Function: Get new missions to
                          try

Code: BrownNoser
                          Available: on HercBase screen
                          Function: Jump to the next rank

Code: Boto Bombs Anyone?
                          Available: on HercBase screen
                          Function: Buy Special BGMs

Code: Herc Me Some More
                          Available: on HercBase screen
                          Function: All Hercs are
                          purchasable

Code: He Who Dies With The Most Toys
                          Available: on HercBase screen
                          Function: All technologies are
                          purchasable

Code: I Am Whole Again
                          Available: on main combat
                          screen
                          Function: Heal current pilot

Code: Look Into My Eyes
                          Available: on main combat
                          screen
                          Function: Edit pilot data

Code: I'm Feeling Much Better
                          Available: on main combat
                          screen
                          Function: Repair current Herc

Code: Run like the Wind
                          Available: on main combat
                          screen
                          Function: Energize current Herc

Code: I'll be Back
                          Available: on main combat
                          screen
                          Function: Restock current Herc

Code: I cheat therefore I am
                          Available: on main combat
                          screen
                          Function: Reset current unit

Code: Hollywood Hercs     
                          Available: on main combat 
                          screen
                          Function: Reset entire force

Code: Fly Like an Eagle
                          Available: on main combat
                          screen
                          Function: MegaEnergize force

Code: Mine your own business
                          Available: on main combat
                          screen
                          Function: Mine all ore

Code: Hello World
                          Available: on main combat
                          screen
                          Function: Activates a series of
                          menu items to allow you to
                          adjust the fog of war.