Ya, I have a "parts" folder too. If I have something I intend to use a lot in a scene, say a lit lamp posts. I will set one up, drag and drop it to my parts folder, then darg and drop it back to the scene as many times as needed. I mostly do this with lighting, so once I have an over head florecent light set up I can reuse it; a lot.  

And since we are pluging plugins http://www.digitalcarversguild.com/carraraplugins.php

I lost my last parts folder going from XP to W7; had several shrubs in it I made with carrara. I also lost my Betty Page dynaimc clothes with a folder full of Studio content: Optitex

Going from W7 to W8 was a lot easier, but regretful.