Out of curiosity, I downloaded the C85 Native content zip and took a look at it.  When you open it, there are two sub directories:  Carrara_8.5, and Content. 

The stuff in the Carrara_8.5 folder is the Carrara stuff and goes to where you keep your presets.

The stuff in the Content folder is the DAZ stuff and goes where you keep your Studio files. 

All of the Carrara 8.5 Native content and the Carrara 8.5 Pro Native content is just shaders for Genesis.  If you don't plan on using Genesis, there is no point worrying about these files.  All of the true Carrara content is in the Carrara 8.0 Native Content zip (your shapes, leaves, scense, lights, etc.).

I was not, by any means, recommending that you use DIM, I was just telling you where DIM installed the stuff to.