how could i make this photo black and white, but keep his eyes the same color (green)?

[Michelle]

and if anyone could be really nice...would someone be willing to do it for me? i would definitely give you best answer haha =x i dont have photoshop...

http://s76.photobucket.com/albums/j27/tennisgurlie143/?action=view&current=asdf-Copy.jpg
thank you SO much emily!