I've bought a Panasonic NVDS-29B and want to use an external "bullet" camera with it. Apparantly, I need AV-IN. I don't think that my camcorder supports this - is it possible to change / upgrade my camcorder to support this? If so, what do I need to do, and how much will it cost? Are there any alternatives that would allow me to support external cameras with the NVDS-29B? Any help gratefully received. Cheers, Ben.