Invincibility:
Using your text editor, alter the "rts_cfg.h" file in the game directory. Change the values for the following lines to "0.0" so they resemble:

float EASY_DAMAGE = 0.0;
float HARD_DAMAGE = 0.0;

Begin game play under easy or hard difficulty to have shields that cannot be harmed by normal weapons.

Better transporters:
Using your text editor, alter the "rts_cfg.h" file in the game directory. Change the value in the "TRANSPORTER_MAX = 5" line to a higher number to transport more people.

Faster transporters:
Using your text editor, alter the "rts_cfg.h" file in the game directory. Change the value in the "float TRANSPORTER_DELAY" entry to "0.0" (or "0.1").

Better resources:
Using your text editor, alter the "rts_cfg.h" file in the game directory. Change the following settings under the "// resource gathering parameters" to change the corresponding resource.

Edit the "int cfgMaxDilithium" value to change the maximum amount Dilithium that can be mined.
Edit the "int cfgMaxOfficers" value to change the maximum amount of officers.
Edit the "int cfgMaxCrew" value to change the maximum number of crew members.
Edit the "int cfgStartingDilithium" to change the initial amount of Dilithium available.
Edit the "int cfgStartingCrew" to change the initial number of crew members.

Build your own mission:
Go to the multi-player screen and enter "Instant Action". Select your team, the amount of money you can have, a large amount officers, and plenty of crew. You can also turn off fog and clouds. Then, select the map and push "Launch" to begin.