Quote - OK, noted with thanks. 

I have not used the poser 7 Content Collections much because deleting them seems to be impossible for me.  I just seem to get more and more Content collections in my library.

You can delete them directly in operating system from outside of Poser in "Poser 7RuntimeLibrariesCollections". Thy are simply shortcuts to the proper items so there is no harm in getting rid of them if you don't need them :) Michal 4blueyes