I've got the site basically up to completion got the easy pops done, got the attributes set, but the one job left to do is set images for each seperate category

i have 6 "Top Level Categories" each will have 7 sub categories of its own each requiring its own image to show the user what they need to see to go further and further in to get their final product..

what would be the quickest and most officient way to add all the category images? at the moment im doing it manually which is a slow task.. is there a quicker way?

is there a tree view of all the categories where i can set up the category images?