No, lower resolution is 1366x768 and below, yours is high, 1600x900 and up as I said.
When moving kext to /L/E, ignore the error. It's a permission issue. Run the commands to fix permission and rebuild cache AS STATED in the guide.
sudo chmod -Rf 755 /S*/L*/E*
sudo chown -Rf 0:0 /S*/L*/E* sudo chmod -Rf 755 /L*/E* sudo chown -Rf 0:0 /L*/E* sudo touch -f /S*/L*/E* sudo touch -f /L*/E* sudo kextcache -Boot -U /
If you're talking about wireless USB adapter, see a list of tested devices here. Your Intel Bluetooth may work with a little patching, but in my experience it's not stable.