CrossRoads:
2. That's one way to do it. I use my MKii to burn a bootloader to set the fuses, and then File:Upload using Programmer to load the sketch. Mostly because I don't like waiting around for Atmel Studio start up.
Many thanks again - that's how I successfully did my 1284P-PUs, I just thought that a different signature would mean different bootloader, but now I know it's all the same.
Cheers!