As for what you propose in your final paragraph, I hope someone who knows more than do I responds, but if I were going to roll the dice on this I'd restore to a different drive, and after making sure that the non-MFS partitions were the same size as the ones on the 2TB drive, I'd use dd or dd_rescue to copy the good new ones on top of the suspect ones, leaving the partition map and the MFS partitions on the 2TB drive untouched. But I haven't tried that particular experiment yet, so no guarantees whatsoever. As far as kickstart is concerned I think you need to read up on it a lot more. You don't access it from the TiVo menu, you get into it by interrupting the boot process at just the right moment. You could also ask someone more knowledgeable than am I whether trying the bootpage fix options in WinMFS is a viable idea in your case. I have no idea if WinMFS works with comer'ed drives or not, or even if it works with S4s or not.