I have 2 722Dvr's and have questions regarding the Powerline Broadband Connector that I may purchase. Does the PBC need to be on the same electric outlet phase as both of the 722's? I plan to use my PC for setting up recordings etc.. Can I set up a program to record on either one or both of the 722's from the PC? Can I watch a program that is on one 722 DVR Hard Drive on the other 722? Can I watch a program that is on one 722 DVR External Hard Drive on the other 722? It may be worth the time and investment in a PBC if it can do the above.