FYI for anyone else, I copied that itf file to the root of my device and it just did it, VERY Cool!
As soon as I copied the file to the device, the Explorer window disappeared...
I'm sure it was because the device had detected a update file, and was already busy installing the update (so it disconnected from the PC).
Looking at the device screen it was displaying its install animation; after a minute, it rebooted itself.
When it came back up, the itf file was gone (it even cleans up after itself
As a software engineer I was impressed!
I've never seen an implementation like this, I can guess what it's doing, but it's still the coolest "manual update" I've ever seen.
Bravo DiabloSport!
Thanks again Mike, going out to the garage to try it out now!
Pete