Group photos comments - the lack of

It seems the photo feature of groups is very basic.  I am getting a lot of requests for being able to comment on photos in the groups.  If that jquery viewer thing can be ripped out; there are other ways to present a slideshow of photos; then perhaps I can add comments to photos in the group.  I have examined the database and I see two fields for group images; entry_id and media_id.  Am I correct in assuming that entry_id is the group number and that media_id is the file number of the image?  I noticed that the group module does not have its own data storage; which I think it should instead of dropping the images into; I assume, the photo module.