What you should do, Bloodymage is assign tag names to your images in your library. Let's say, for example, you have a series of tokens for a campaign called "Mines of Darkmoore". If you add the tag "Mines" or "Darkmoore" to these images, when you do a regular image search for that tag name, it'll show all the images with that tag first on your search list.
To add a tag. Go to Your Art Library. Find an image you want to add a tag to. By default, an image will have a tag that is the image's file name. Click on "Edit Tags" and start adding single key words in the offered text box. Hit the Enter key to complete a tag and move on to a new tag word. When you've added all the tags you want to an image, click on "I'm Done!" to accept the changes you made.
