Personally i use 1 runtime (external) for each artist (vendor). Then i have a folder or group of folders with a picture of the product sorted as v4 character, scene ,prop,etc.

This allows me to view what i have in my runtime as needed click link to vendors page for deatiled info,and any addons for that package.

also when loading poser, i know the artist or group of artists the products and all i need before hand, so no searching poser library for it.