sierra on x58

i first changed my machine to imac 14.2
downloaded the files (based on my system)
downloaded the beta (after setting to iMac 14.2)
generated the installer usb based in my setup
for x58 i only needed to add PctrootUID=0 the get to installer
after install booted ok
but....when i installed the nvidia web driver(for sierra)
no booting i get the black background with the white apple. progress bar goes half way then reboots
in obviously missing a setting or kext....
a work in...

sierra on x58