There is no lifetime sub hack for the DTivo or HDTivo. You must pay for the DVR service regardless of which model you own. The original S1 DTivos used a hack called fixsub which would indicate lifetime service in the system information screen and would allow you to get free DVR service with the old Hu cards. This was actually the original nophone/fakecall hack and was meant to eliminate the nag messages associated with not dialing out. Once the Hu datastream was shut off so was the free ride for those that took that path. Now you have to pay to play, plain and simple.