During gameplay press [Enter] and type in one of the following cheats:
youstopmecold - Faster building of ships
avoidance - Rise number of crew members
kobayashimaru - Skip to Next Mission
showmethemoney - Increases Money
phonehome - Chat List in Multiplayer Mode
screwyouguysimgoinghome - Boot List in Multiplayer Mode
canofwhoopass - 99 Additional Officers
First open the file RTS_CFG.H. Go to the line under difficulty settings and modify the line which says:
float EASY_DAMAGE = 0.5;
float HARD_DAMAGE = 2.0;
float EASY_DAMAGE = 0.0;
float HARD_DAMAGE = 0.0;
or whatever you want. Higher numbers make it harder. Then set the game difficulty to Easy or Hard. This will make your shields impervious to normal weapons fire. Any specials that naturally kill shields will still work.
Transport More People
Modify the same file as above (RTS_CFG.H.) and look for the line TRANSPORTER_MAX = 5;. Change this number to something higher and your transporters will carry more people each time.