The best way to approach it would be to create a runtime for whatever product you are working on, to keep it separate from everything else in your runtime. Then add that runtime to Poser as an external runtime.

You will have to set up the proper folder structure in this external runtime, and add all the content in your product to it (geometries, textures, library files like materials and CR2 or props, etc). 

It does seem like a lot of work for your first couple of things, but you do get used to it eventually. We have all been there, and trust me it does get easier. You might find it worth your while to learn how to do these things yourself instead of relying on others to help you complete your products.

The Renderosity store has standards for how file folders should be arranged. I can't find the post at the moment, I will post again once I find it.