everytime i try to install an apk directly from my phone using app installer I get the message im not allowed to install non marker apps. I have usb debugging turned on etc. Ive heard reference to turn on allow non market apps to be turned on but I can not find this preference anywhere. Where is it? Im tired of having to use side load wonder machine all the time when I can just dl or use drop box and can do right on phone. any suggestions?