Can you take a screenshot of it so we can see what's going on please? :)
The first thing you need to do is open up 'fmaneMask' in GIMP or Photoshop. (I use GIMP, it's easier) Once you have done that you need to make sure it's on a transparent background, you can tell it's a transparent back ground because it will have grey squares. After that, get the select tool and select the whole canvas like this:
(http://i41BannedImageSite/152m3v9.png)
Then you need to right click the mane and go to 'Select then 'Float' and it should select it all. Then you can draw what you're wanting your mane to look like on the mask and it won't go over the transparency. Finally, you need to save the image as a .PNG image and name it preset_(presetmumberhere)head.png and Merge the layers if it asks you to. Don't flatten.