A lot of people mentioned taking the underpanel off and operating the latch with a long screwdriver. I'm guessing it is hard to find the latch from so far away?
The corner light tab is about halfway up the light and has two teeth that hold it to the headlight. DDM has a corner light install guide which you might find helpful. Hopefully this link works (it is to a pdf document)
http://www.ddmtuning.com/support/ind...nloaditemid=23