ulukai123: Note, this will NOT WORK if you have "console" under "options / advanced" checked in the in-game options menu!
Apparently, this will override the parameters you set as command line args for MOHAA.exe for the console to be started with. I guess this option just internally makes the game call for starting of the console the same way as would the cmd line option do, and the former overrides the call to the latter. And obviously the console that can be enabled in-game just for things like texting, will not have further parameters on that call, like enable cheat mode...
I had that problem, then got that idea, disabled the console option in the in-game menu, quit & re-started the game with those cmd args to enable stuff, and voila... it works.