It's possible to embed .rar files in .jpegs. They display as normal images but you can access the contents of the archive when you change the file extension to .rar. Would it be ok to upload doujin covers with the full doujin embedded in the file and then leave a comment saying to change the file extension?
I'm thinking that it would be cleaner than adding every page as child posts and a lot easier to save.
Updated by Quess