You should be able to fix the reboot loop by following the 'rescue' maneuver in the third post of this thread. I think it's sufficiently 'spoon-fed', but do let me know if you need clarification. Do you remember what options you used for the upgrade? I assume that you didn't do -s 127 because of the reboot loop. Is it possible you did -s 128? See the first post in this thread (and Cpen's post on the first page) for instructions on how to check this. If you did -s 128 then instead of the rescue maneuver you should manually initialise your swap as described in the first post. You can/should do this to both your TiVoes. On the other hand, if you didn't use -s at all, then you can't permanently increase your swap, but the rescue maneuver should allow your TiVoes to recover from a green screen if it happens again. Note that the TiVo can not take a software upgrade while it's in the 'rescue' configuration (because we're using the space required for the upgrade for swap). However, as DTiVoes do not seem to be due for a software update any time soon you can regard backing out of the rescue as non-urgent.