34 - How to use the global lense flare
Fluen has made a wonderfull tutorial on how to set up the coordinates for the global lenseflare.
Lenseflare Tutorial 1 - How to set up a global lensflare
This part learns you how to set it up in the script and it also tells you about the do's and dont's and what effect the horizon and clouds can have on the lenseflare.
Lensflare Tutorial 2 - How to understand and calculate global coordinates
This one tells you what the script numbers (coordinates) mean and how you can calculate the coordinates to place it exactly where you want it!