How do I put pics directly into categories?

[Celeborn]

How can i put pics directly into categories, and not into a user's album?
I want all pics to be separated into categories, but not a new album for every user.

[jasendorf]

Make only albums and put them all in the category *No Category*

See my CPG to get an idea of how that ends up looking:

http://www.338tharmyband.com/photo_gallery/