Default Movie Sets Artwork

Hi,

Question re: default movie sets artwork with Frodo 12.1

My Directory Structure:
C:\Movies\A\<movie title>\Movie.avi
C:\Movies\B\<movie title>\Movie.avi

Scraped using default TMDB.
When I enable "Group in Sets" and thrn enter the "Sets" menu library, my titles are all grouped in sets, however they are using strange artwork and posters, for example my diehard collection uses die hard 2 poster for the collection?

Now, when I bring up the context menu on these sets, and try to select more appropriate artwork, I am greeted with only 1 choice and no online directory to choose artwork from?

Now, as my movies aren't grouped locally in sets, I'm pretty sure that movie sets artwork downloader won't work for me as it says in the thread that it searches for common groups (which I don't have)

So in closing,
Using a default xbmc setup, scraping a source tht is structured A-Z (with no local groups or sets) xbmc is grouping my movies into sets using tmdb data BUT randomly assigning 1 of the movies posters as the "sets" poster and I would like to change this automagically.

Is there a way to tell xbmc to take these known sets and download the actual "set" data from tmdb?