How to open the Grates in LA

To get the last stat point in LA (depending on who you're playing with) you need to open a grate on top of the building in front of you when you start the level.

It can't actually be done from that building. To open ALL the grates in the level, you'll have to go over to the building on the far right, behind the building with all the glass windows that you can bust through. (when I played the first time, the 'A' was located in between the steps that lead up to this building.

Anyway, there are grates here, too. The trick is to grind low ledge that goes along the building. Be sure you hop over the gaps made by the doors. One of these gaps is called "Their GRATE!" This opens all the grates on the level, including the one that lets you get the last stat point.

You have to grind the wall around where the other grates are. By the stairs you have to trick over for the photo man. That will open all the grates.