sure thing mang.
in your desktop icon, do this:
1) Right click, Properties
2) Look for Target, and in the textbox there should be something similar to this:
"C:\Program Files\VUGames\Tribes Vengeance\Program\Bin\TV_CD_DVD.exe"
3) Edit it to this:
"C:\Program Files\VUGames\Tribes Vengeance\Program\Bin\TV_CD_DVD.exe" -console
add a space after the closing quotation marks and add -console.
4) Click Apply
5) In game, hit the Tab button and go at it with the commands.
stat fps
^that's the console command to turn on the fps counter. type again to turn off.