First, download the UG007 FengHuang v0.4 firmware from here or from here. Unzip the archive to get the 'update.zip', copy this file to a TF card, stick the TF card into the Rikomagic MK802IIIS stick, this will recognize the update.zip as authentic, and prompt you to upgrade. Accept the upgrade, eait while the file is copied, and the stick reboots into recovery and install the new firmware. The system will reboot normally and return to the normal state.
FengHuang is a Jelly Bean Firmware based off the official UG007 release and AOSP.
XBMC Compatible and Tested
Enjoy this new firmware!
Always keep in mind that this is not a review, just a first sight of this firmware. You have to test it more for another details, to see if it satisfies your needs.