Does the SD DVR40 have ability to "Chase Play" while recording?..That is start watching a program from the beginning while it is still recording,regardless of how far along that recording is in progress? I understand the "pause live TV" feature has a 30 minute limit,but Can I watch a program from the start while it is still recording regardless of the length? Also,can you watch a completed previously recorded program while simultaneously recording a new program, similar to how DVD-RAM recorders or DVD w/HDD recorders can function?