njon, you have to have the full version of Quicktime to make a .MOV. I don't belive Maya does Quicktime. I believe what gster123 is telling you is not to try and render a movie, but to render .TIF of TGA and composite it in another package. As he mentioned if Maya chokes on it at least you have what it has already rendered and won't have to redo them.
Challenge me and I will try. Because If I should fail, failure also has a prize (Knowledge).