Phil,

Thanks for your excellent support (and tool). Adding the Lens ID and Model sequentially as you described works like a charm (I just made two separate one-line arg files for that and run them one after another). Since I'm scripting this all it doesn't cost me anything to add those lines separately (well, not compared to converting ~20 MB RAW files :).

As for how to implement a copy mechanism, I'm not really sure. I think it would be a great feature but, as you mentioned, the distinction between 'existing new values' and 'existing original values' is not straightforward for everyone (possibly including me!).

Thanks again, -patrick