Halo Console Commads? Speed tricks?

[neonart]

I found that pressing Tab in Halo brings up the list of commands for Halo, but I can't get a FPS counter. Is it possible to have a running frame counter?
Are there any other tricks that can be done maybe in the preference files, like in the .uni files of UT & Raven Shield, and in the .xml file of Ghost Recon?

Thanks in advance.