I have their shuffler product which produces 2D maps/floorplans. It includes a base set of textures and has customizable text functions. As for importing other textures, I don't believe it is feasible, especially since the company releases expansions and software updates. The expansions are reasonably priced and I've received several free software updates (which provide additional features/textures) since a Novemebr purchase.
For 3D products, you probably need to import the pdf file into a graphics program like GIMP (freeware, open source) or photoshop to manipulate it.