This has turned into the 'Which Rimmer?' thread from a while back! My own personal preference is that there is no part of Nano Rimmer in the current version, because I really disliked that Rimmer (I love Rimmer from series I, but the one from VIII doesn't really come across as 'Rimmer how he used to be' for me). The only event that we know current Rimmer 'remembers' is saving them from the corrosive microbe - and perhaps he doesn't even remember that, since surely the others would have discussed those events and he was just appropriating that Rimmer's seeming 'heroism' (of course he would, it was still a version of him after all). I still wish they'd gone with the original ending, it would have made more sense. Then we could just assume that Nano Rimmer died in some unrelated incident and then they rebooted him as a hologram. What it wouldn't explain is why the ship changed shape again or what happened to the rest of the crew.