I enter all of the correct cheat codes in the console, but they do not affect the game. Any ideas?

D

Cheats were taken out of the game in the last patch.

as JohnnyRock30 said, many commands were disabled in Patch #1.
In order to cheat, you'd need to get ahold of an unpatched *.exe for the game, or wait for Patch #2.

They just came out with a patch and still no cheat codes - RAGE needs to put them back for us people who want to use them.

Totally agree.

I need some kind of command to spawn enemies, like Doom3 had. Why? Because Rage really needs more enemies.