I was recently watching a video on Joe McNally, and how he uses multiple flashes when he works due to their portability. My question is, is what he does possible with Canon? i know you cant fire a strobe with the cameras flash like you can with nikon, the ST-E2 doesn't support rear curtain sync as far as i know, and only supports two channels (A, B) and the 580 can support 3. few other questions, can the 580 activate the flashes on the different channels while not firing itself? I was also looking into pocket wizards, but id need a pc sync cable to connect them to the flash? and do they support Ettl? I guess im a real fan of Joe's lighting and want to be able to do the same thing with canon.