Yes, I think so. We tried endless numbers of things with modifying the superblock, and none of them worked, although a few came close. There are hidden checksums, and additionally at least two places where the tivo notes that the drive is married, and gets confused about that. One of the lessons learned was that a divorce inside the tivo takes AT LEAST five minutes. If the divorce screen disappears and the machine reboots after a minute or two, it's just going to ask to divorce again, over and over. Yes, but... Once the new drive is booting properly, you must remove it and delete newly created (by TiVo) partitions 14-16, after which the # of partitions on template pages 1-13 must be changed to 13. Pdisk does not work for this. We used Ibored. Once that's done it has to go back in the TiVo to be divorced again. It should take 5-10 minutes. At that point, drive can be pulled, and mfsadd can be used to expand the drive. Then back in the TiVo again to clean things up using its self-healing properties. After a successful boot, remove from TiVo, and Winmfs can be used to supersize it, and done. A supersized 2TB drive should have about 318 hours HD recording capacity. DO NOT use Winmfs for anything except to supersize. Using it for anything else will make the disk unbootable. I have 318 hours of capacity on the internal 2TB drive, and it's been up and running since July, so the mod seems stable. Yes, that was one of the first things we tried. A frigging nightmare. Never worked - drive either asked to be divorced endlessly, or else the TiVo would say that the wrong external drive was attached. And please keep in mind that the "release" version of MFSlive WILL NOT WORK to do this with 2 TB drives. I am posting this in the hopes of inspiring others. And on a selfish note, because it would be great if someone came up with a way to do this with the internal drive having been increased in size once, so I could do my other S3.