Your post isn't clear as far as what you did. You start out referring to trying to install a wireless driver and in the next sentence you have the statement
I tried to change the directory to /usr/src/linux#
. The way it is written would mean you tried to rename that/those directories. Is that what you did? Why? Or did you actually mean you tried to change to the /usr/src/linux directory using the cd command? Those directories are root:root. Were you doing this as root user? How were you trying to install the wireless drivers? Your problem now is that you CAN boot to a gui using Recovery mode but not with the standard boot entry?