Hiya,
Not sure if this is possible but is their anyway to upload images to a service such as sendspace or any others, but somehow have albums on CPG linking to those images? Like all images (full size, re-sized, thumbs) have their own sendspace (etc) link?
Sort of like how music blogs have links to music but the songs are actually hosted elsewhere.
Have a look at this plugin: http://forum.coppermine-gallery.net/index.php/topic,67980.0.html