This whole process is a little scary in the beginning, because it looks so ugly and distorted. I think it's important to"overpad" if you use quilt batting because it compresses so much. The idea is to put a skin tight cover over all this stuff so it replicates the human body as much as possible.
Several people on the web have said just to wrap the batting around itself and it would stick--I found that I could not really refine forms doing that. I needed to tape the batting tightly in place to hold the batting where it was needed. In a perfect world, I think next time I would go with the Fabulous Fit because it comes with pre-formed body shaped polyurethane pads with just the right amount of squish factor.