Which content folder is DS using?

As for content downloaded from Renderosity for DS, those are the folders that have the 'ds' letters in the title.  Without knowing how the folder hierarchy is set up within the ZIP files, it is hard to advise how to proceed.  Screencap an open ZIP file.  Also, answer the question I proposed at the beginning of this comment.

MAC's have been notorious for overwriting folders, not merging them.  I don't know if your OS version supports merges, so it will get tricky installing the Hivewire Big Dog.