This cursor is a frame. It is an attempt to make a large cursor (so you can find it easily onscreen) without covering item's when you have them on the cursor.
I've updated it (now that I can) to make it a more uniform color. The original idea was that it would be visible with both dark and light backgrounds if the color of the cursor gradiated between dark and light, but it ended up just looking sloppy. So this one is (more) uniformly light grey.
The pointer position btw, is the top left corner of the frame.
Known problem: The cursor covers some tooltips text
Just extract the files from the zip into your UI directory and follow the readme.txt file directions. Credit for the readme file goes to Xymarra of eqinterface.com, since I kinda stole it from his/her large cursors zip in order to not have to write my own. =P