I just can't leave it alone...
See help???.txt file in the zip file. I's NOT a Macro.
You will need to get another couple of files from the forums as they're NOT INCLUDED,
One's the axis plug by R. Kaiser.
It's located here http://www.zbrushcentral.com/attachment.php?
The other is CenterMesh located here, I don't know whom to credit for it.