Okay, how about this:
You have a catergory, but you have a field that fetchs or creates not just the bbcode for an image, but for all of them?
You have 3 images in a catagory. You choose 'get catergory bb code' somewhere on the browseimage view.
It generates either:
[ img ] path 1 [ / img ]
[ img ] path 2 [ / img ]
[ img ] path 3 [ / img ]
[ img ] path 1 [ / img ] [ img ] path 2 [ / img ] [ img ] path 3 [ / img ]
Which you can then copy and paste into a post and maybe edit.