MakeCubicPPC is a simple app for creating cubic QTVR movies from six faces or from equirectangular spherical images.
It's especially handy after retouching faces exported from a stitcher, or for making cubic panos from 3D generated imagery. It also can convert equirectangular images to cubic panos.
You can also drop an already made 6-frame cubic vr movie. The app will then use the existing compressed data in the file and let you set new angles, etc.