Nevermind, I got it, just right click the Shortcut, and add: +set com_allowconsole 1 in the Target box.
IE: "C:\Program Files (x86)\Bethesda Softworks\Rage\Rage.exe" +set com_allowconsole 1
Then use ~ to open the console
cvaradd g_infiniteammo 1
cvaradd g_permagodmode 1
g_fov 80 (Field of View, 80 is default)
Thanks to Darth on here also for posting.

The rest is up to you to look up in the console if you're familiar with Quake 3 and Quake 4.