To enable cheats, edit basis\campaigns\JAZZ\global_vars.lua (using Notepad) and change cheats from 0 to 1; (you can set starting money by modifying Start_Money_Easy/Normal/Hard).
Modify the quick start shortcut with the "-cheater" command-line parameter.
Load the game, in the console you can type 'cheater' to enable cheat codes. You can also use the following cheat codes.
|heal [player] nn||Heal Named Player (Hired Merc Callsigns)|
|kill [player]||Kill Named Player|
|gainxp [player] nn||Add XP to Named Player|