Download products

Hi

I want to do a wordpress e-commerce where the products are images. This images has different sizes. I read it´s possible to have one product (image1, for example) and to add variations on product to have different sizes option in the shopping process (the customer can select the size of the photo and depending the size the price of the photo can change).

My question is: it´s possible to associate every variation of the product to one file download? I see that every product has a “download product” option but I don´t know how to associate every variation of the product with different download image. Image downloaded múst be different depending the variation selected in the shoppping process.

Is it possible? Thank you very much.

http://wordpress.org/extend/plugins/wp-e-commerce/