Hello, Thanks for highlighting the issues! Indeed, it would be a major undertaking! I am aware of certain copyright issues; however, I do not think that the actual pz3,cr2 files are copyrighted...because then a lot of programs in the MP would need to be pulled for reading/writing those... As for this project to fly, there would be need for a few volunteers, since it is not for one person...of course there will be no profit: it would be open-source...gpl. kim99, you have a pretty cool thing going there! If there is interest, it would be nice to convert your code into c++ and build on it... PD