After removing the 10mm bolt holding the corner lamp (mine's broken because the body shop put it in crooked and used cheap bolts which are all rusted and broke as soon as I put a socket on it!!), the corner lamp needs to be "popped out" from the front of the car. I use a screwdriver to get between the corner light and the fog light and it popped right out with just a little pressure.
'04 I35 - 17" G37 Sedan Wheels
RIP 6/25/13 - '98 I30 - 17" G35 Sedan Wheels, Cefiro One Piece Head lights, Frankencar Intake, WSP Y-Pipe, 20% Tint