Hello, I work for a medical supplies company and they want me to start shooting their product photography. I will be using my digital camera (D70s) & flash (sunpak 555) but they want me to purchase a white backdrop of some kind and some lights to get started. I have no idea where to begin. Does anyone recommend a backdrop system (I'll be shooting products as large as wheelchairs with people sometimes using the products.) What kind of lights, lamps, or flashes? I've been shooting for 10 years but never ventured into product or studio work so any help is much appreciated!!