First, make sure the device is flashed for version 4.0 of the default OS (Linux). This allows you to have dual boot (Linux, WinCE) and other things that are required for WinCE to be used on the SD card. Get 4.0
here. Follow the instructions for flashing your device found
here. BE SURE YOU GET THE *LATEST SDUPDATE PROGRAM. THE ONE IN THIS ARTICLE IS OLDER THAN THIS ONE: Get the SD Update Tool application
here. Make sure you use this application according to the instructions above (even though they are for 1.1 of the SDUpdate tool)
You need a license from JionTang. Once you have that file, you must also download the WinCE image from SmartDevices
here.
You need an SD card - I would recommend one at least 2GB in size, bigger if you can. Inside the RAR file for the WinCE image is a file simply named SmartQ7. You won't be flashing the device's OS, the WinCE OS resides completely on the SD card and you can dual boot. When you get the WinCE image on an SD card and put that card into your Q7 and turn it on, you will be offered a menu asking which OS you would like to use. Use the arrow keys on the face of the device to choose the OS, and the MIDDLE button on the top of the device to start loading that OS.
If you need more help you can ask here in this forum or in the fan forum over
here.
Nation - I'm not sure he can get a license that way - I think you have had to purchase the device in a certain timeframe that has already passed to qualify, but its worth a shot. If you don't qualify you can get a license from JionTang.