I'm doing my first real (Something with external sound equipment) short film and I'm just learning. I got some help from a guy on the IMDb message boards and with that I ordered the Sennheiser ME66/K6 combo and a Boss BR-532 recorder. I was also advised to get two XLR cables and to buy a boom, shockmount and zeppelin. Why would I need two XLR cables instead of one, and what are a shockmount and zeppelin?