All ye who have photoshop

I need your help!
So yeah I forum
Coz of I'm all cool like that
And I really wanna use this signature
HOWEVER
The girl in the picture is in fact fair haired, when she would need to have black hair
So so so so
If you love me and are very good at photoshop (coz I know its way hard to change light hair into black) would you be able to do it for me pretty please?
I have no photoshop!
Only humble paint, which is just annoying >.<
http://i22.photobucket.com/albums/b328/WhiteTiger15/anime/333v4h3.jpg
That's the link to the picture
If you do it for me I shall be eternaly in your debt
Plus! I'll pay you in cookies!
Or story comments or whatever you feel befitting ^^
Love you
Mary
XXX