I had a similar issue, but I'm not sure if my solution will be the same for you or not. But one of the problems I was running into was actually putting it in the correct USB mode. When I read "Hold B and reset", I used the physical button on the right, instead of the actual reset button that requires the paperclip. So make sure that's what you're doing. When you plug it in and see the USB icon on the screen, then you've done it incorrectly. If the unit appears to be off (while plugged in!!), then you have done it correctly.
As soon as I did that, it popped up with the correct unit (ignoring ChinaChip). Go to Device Manager, find the unit (AZ followed by some numbers), update drivers, and select the DualBoot folder.
If on Vista/Windows 7!!: After the DualBoot drivers are installed, you wont be able to use the drivers since they are unsigned. Restart your computer, and when it starts to boot up, hit F8. You'll be prompted with a DOS window asking you various options. Select the option that mentions something like "Driver Signing", or something to that effect. Should be easy to find, not to many options.
Hope this helps you.