You are now ready to start USB networking on the Kindle DX. If the e-reader is still connected to the PC, disconnect it and navigate to its home screen. Next, tap the Del key on the Kindle DX keyboard. A prompt will appear. Type ;debugOn and press Return. Note the semicolon at the beginning of the command; you can produce it by using the Sym key. Next, tap Del again. Type `usbNetwork and press Return. This command starts with a backtick, which you also produce via the Sym key. Make sure that it's a backtick, not a single quotation mark. Once you have that, tap Del one last time. Type ;debugOff and press Return.

Great job! Your Kindle DX is now ready to create a virtual network with your PC, over the USB connection. Use the USB cable to connect the Kindle DX to the PC.

When you connect the Kindle DX now, Windows will not mount it as a USB storage device. Instead, Windows will install a new device driver for it. This process takes a moment, but does not require any intervention on your part. Simply wait until you see 'Ready to use' pop up on the screen. When that appears, it is time to configure this new connection on your PC. In Windows 7, navigate to the Network Connections menu by opening Control Panel > Network and Internet > Network Connections, and locate the 'USB Ethernet/RNDIS Gadget' connection. Right-click that connection and select Properties; then, within the properties list, scroll down to 'Internet Protocol Version 4 (TCP/IPv4)'. Open the Properties menu, select Use the following IP address, and enter 192.168.2.1 for the address and 255.255.255.0 for the netmask. Click OK, and then click OK again to close the connection properties window.