You have to make sure the coding matches up with everything, otherwise it just displays as black and yellow or textureless white.
I think your preset looks amazing, keep it up!
As for the mane, there is a possibility the file is the wrong type.
Are you certain the mane texture is saved as a png file and not jpg?
What Avani suggested above is usually the main fix, but just in case, try replacing your mane coding with this:
material preset_#_maneMat
{
technique
{
pass
{
cull_hardware none
cull_software none
alpha_rejection greater_equal 128
texture_unit
{
texture preset_#mane.png
}
}
}
}
Also make sure that everything is named correctly to what is already typed up in the material file (unless you have re-named a few things). The area highlighted in orange is the only thing you should change in terms of image name. The area in red is the coding that is used to prevent any see-through mane issue (an optional thing to add, just in case, if you don't have it added already). The area in green is the format the image needs to be, especially as it's got transparency in it. Make sure you've got everything named correctly.