I don't know if this is practical or do-able. Would it be possible to have PM remember the last set of IPTC edits AND have a way to paste that as I'm editing? Here's the scenario...
As I edit I update the caption box, maybe an IPTC field or two. Now I know that I can copy that and have it ready to paste BUT that means having to hit the copy button every time. What if PM just 'remembered' my last set of IPTC updates and had those ready to go for future files? Then when I get to a new player I manually update that one and subsequent files as I advance though the edit I hit a "paste last" button and bingo everything from the last manual edit is pasted into this file.....
Just a thought.