Renderosity purchases for DAZStudio will not show up in Smart Content, that is a DAZ feature for DAZ based content only. The hierarchy of folders for a particular vendor will vary depending how specific the breakdown. Since V4 has a tremendous product line specifically aimed at Poser, and most DAZ products, if not all, are designed to adhere to the Poser runtime hierarchy, I would suggest creating a separate external runtime and link that to your DAZStudio Library. That way Rendo purchases can be manually installed to that runtime and DAZ purchases can be automatically installed using DIM, provided that you feel comfortable and competent working with DIM in the first place. There are guidelines for working with DIM and a good number of them are found throughout Rendo and DAZ. Or just ask.