I can't remember myself whether Rimmer said he knew about or remembered the original Squid. Assuming the former Rimmer could have been told about the original adventure with the despair squid. In fact boredom being such a factor in the Dwarfers lives I think it's highly unlikely that he never heard the tale. After all story telling is a great pastime. I'm a little intrigued by Kochanski's transport problem too. Shuttle craft are as we've seen an indispensable part of RD life. It's likely the Dwarfers repaired a couple of them that were broken down at the time of the evacuation. Or found one or more in a part of the ship that nether the full crew or the Dwarfers had explored before. Perhaps put there by the Cat Race and reproduced in the same position when the nanobots reconstituted the ship. It's a big ship and has been around for a long time and lots of things have happened to it. Other than that I'm stumped. The Squid I dunno.