Tribes with better graphics already exists.
And it's dead.
FYI due to circumstances beyond my control I've had to change the links to the upscaled textures.
They can now be found in http://ns3.pu.net/upscaled/
and the latest mjhires script can be found in http://ns3.pu.net/upscaled/for-1.40/mjhires.acs.cs.upscaled.zip
link dead?