(guide is updated with new stuff. be sure to check back laterz)
Commands go into [Rage][base]rageconfig.cfg
enables the console but forfeits achevements
0 is off, 1 is smart mode 2 is always on. GPU transcode means that your graphics card does some calculations that otherwise your CPU would have done.
default is 128. 16 greatly alleviates the texture pop-in problems
Increase that if you have lots of video RAM (over 1Gb)
This is max texture resolution, default being 4096. Only enable 8192 if you have at least 1Gb VRAM.
Slightly negative LOD for a sharper image.
This is the Negative LOD bias from your Nvidia control panel.
Best left to 4. increase it if you have the video card for it.
Restarts the texturing system and applies vt settings. Put this last in your cfg file.
Moreover you can add a "+cvaradd g_fov 10" without the quotes to the game shortcut for a 10 degree increase from the default 80 FOV and so on.