I believe the Mental Ray plug in is:
Mayatomr.mll
Edit: If you click on AutoLoad, it should load automatically next time you open Maya. Click on Loaded to load it "now". You can also click both.
Don't be satisfied with what you can do but rather strive to do the things you can't do!
Exceed Expectations!
Last edited by Perfecto; 07-05-2007 at 07:26 AM.