I made a video of what's happening...
at the beggining, it show how the files are stored inside the flashable zip
then I show the zip being flashed with the CWM
then I show the device restarting (everytime I try to restart via CWM, flashing zip or not, it ask if it should fix root, what does it mean?)
and, the device getting stuck at the same SAMSUNG screen
ok, finally I made it, I went to the "mount unmount" and mounted the system before flashing the zip, restarted, and it's working perfectly now