Start the Salvage Yard mission. After rescuing the
injured Jawa, you will travel through the building until you reach
a large archway. On the other side and to the right, you will
see two boxes stacked up. Climb on these boxes to a narrow catwalk
with a blue battery. Collect the battery and continue to the end
of the catwalk. Turn left, then walk through the wall to enter
a hidden corridor. Turn left again and walk down the corridor
to where it darkens. You will find the name "DOUG" on
the right side in large, neon green letters. This was placed here
by Doug Shannon, one of the game's level designers.