Is it possible to create your own Papers that are as full-featured as the 'official' Rebelle Papers?

I have a lot of old vintage weathered paper that I would love to create Rebelle Papers from. In my experiments so far tho, I seem to only be able to create a basic-level paper that is missing a few things (full-color option, edges, etc). Maybe this is a "Wait for Rebelle 7" request, who knows? 

Just from experimenting I found that PNG files can be loaded as a paper texture. On my mac these are typically screenshots. Try other non-lossy formats. If you can photograph/scan your papers, even with perfect lighting, I think you may find some difficulty in seamlessly tiling your texture. You could scale up your custom texture for a single tile but it may create a rather large file from the paper alone. Good luck!