Actually, if you're REALLY serious about it... Maya or 3DSMax is the way to go. They have camera targetting, and you can use what's known as "matte" materials to accurately place lighting and object orientation in the scene against the live background. Blue screens and green screens are something that's used for live actors, but for CG, if you have the right program, you don't need blue screens or green screens at all. In Max, for example, you can render all seperate passes for reflections, shadows, diffuse, specular and alpha. Then composite them all together and tweek them individually if necessary in your video editing program. That's only if you have $3000 + to spend on the software, but it's how the pros do it for the most accurate results.