Tried again using the latest gear, but no joy. Everything else works- I can read/write the device from my XP netbook, etc. It's recognised by my device manager as a JZ4740 usb boot device (Rockbox usb tool). Whatever that is. MS-speak for Dingoo, I suspect. Only issue is "sent data isn't the same as received data..." and, of course, the cmd window says now booting and the dingoo doesn't boot. Or change in any way. It does, however, get incrementially more annoying each time... I assume the data cable is okay based on the fact that it works as a data storage device fine. Any ideas? Am I doing something stupid? Does, for example, the usb card need to be in/out? Should it have a zImage on it before I try all this? Am I holding my tongue right? Grr. Still, I bought the thing to be challenged and entertained, and it's certainly doing that...