monkeycloud, ""I'd rather know which data / support files I need .."

Nice to meet someone who really wants to understand out how things work.

You are quite right the support files in the data folder is missing but rather than attaching the whole monster DS4 Library better to find out how the DAZ runtime look like! One way to do that is to download a freebie from sharecg.com. Once you have an empty external runtime save your figure there and the support files will be in the data folder. If you save as Figure/Prop Asset. Then save again as Character Preset or Wearable(s) Preset. The reason you can not save as Character Preset first is that then the support files don't come along. Just overwrite the Figure/Prop Asset file.