I'm still a bit confused about the ethernet capability of this machine. I gather you cannot move files from a PC to the HDD. Can all files on the HDD be played back via a PC? One review seemed to suggest only MPEG4 files - can MPEG2s also be watched? And can files be archived off the HDD to a PC via the ethernet connection? I suppose if you can play it back via a PC the answer must be yes. Grateful for any help.