I just downloaded Enhance:C (and AnythingGoos and AnythingGrooves) - but, oh my god, I can't find them!!!

I really did follow the instructions and can even find the files in the Extensions (Content > MACOS > Extensions) folder... I create an object in Carrera - go to the render room - create a new mutlitple master shader... and, well, nothing... its all the same as it always was!

I'm using Carrera4Pro on a MacG5 with OSX 10.3.9

Help!

Thanks (hopefully) in advance!!!