Having installed the custom firmware and got the Humax visible on my network, I have copied all the video content down onto a PC. Now totally confused as to what the various file types are and what I need to do to be able to play them! i.e. For each episode of a series there is a folder containing several 28KB .tac files. Outside of that folder for each episode there are separate .hmt, .nts and .ts (the media content, judging from the file sizes) files. Though Windows Media Player 12 adds the .ts files to my Media library, it only plays sound, no video. Any advice appreciated.