or, if the file is already on the player, to fix the PC side copy and use Replace Tune.

I think Tony contends that there are situations where people don't have a PC side copy, so this wouldn't work for them. I'm not one of them, and I'm not really convinced this is a prevalent problem... But I don't want to shut anyone out, either, so I'm glad we're all throwing in our $0.02 to figure out the best way to do this. I kinda like the jEmplode strategy as of this very minute.