Image downloads store - have I set this up right?

Hi all,

I wondered if someone could confirm that i'm going about this the right way..

I am trying to create a store where people can purchase and download images. Images come in three sizes small, medium and large and there are multiple categories.

I'm pricing the images by attribute and so I set the image URL to each attribute which takes a LONG time. Having to create the product and then go back and manually add in those sizes.

I wondered what would happen if I wanted to change the price for all images in the store on the "large" category?. If I used the "copy to category feature" it would do this but all the image download URL's would break. :dontgetit

Am I doing this right or have I missed something important?

:dontgetit Confused!