Also if enough people want me to enable specialmobs then I can. It's a simple file modification serverside and enabling it clientside + minor change to the instructions.

eating my words. Updated the addon pack and the instructions.
You need to also enable specialmobs, and the new addon pack should additionally have archemedes ships and Redstone in motion.

Check above. The txt and the zip included were both updated for monster .10. Was a pain in the Arthur Dent to get it to not mess up its own item ids whenever you ran it for some reason. Some stuff probably vanished or might need fiddling with to get working, but I haven't found anything overly broken yet. Talk with Deadbeard or Seven if you need something spawned and/or fixed.