I can't run the program, cause I'm running win7, and I don't have administrator privileges on this computer so I can't add the missing OSX
So...
There is one other way around this.
Make a copy of your ROM.
Open the copy in the Footprint editing program, change the top left pixel of the first footprint.
Then use your hex editor's compare function to compare the original and the copy.
It should show the offset where the change occurred.
Message me the offset, and the before and after values of the changed byte.
That's all it takes for me to get to work on the plugin.