Here is where I am: Android 2.2, cortex a9 single core 512, model p4021 Infortmic I have rooted with z4root I have download to sd the following which have not worked 1. an Android 2.3 from tablet supplier, but am skeptical that it is 2.3 - it includes a vortexflash.exe and a vortex.pak (which is its largest file). 2 Androzip which I have tried in the main root directory and the sd directory. I got it from Android Central. 3. I have tried from placing files in folders called dload, android, and just placed the files in the root of the sd card. I have tried to boot from the sd card via a simple power on and from power plus volume I never get to place where the flashing begins. I must be missing something.