How do you change a picture to black and white but turn the eye and mouth color into a rainbow?

i am trying to do that, but i can't figure out what program or how...How do you change a picture to black and white but turn the eye and mouth color into a rainbow?
ok so im guessing you are talking about this


http://www.flickr.com/photos/22579717@N0鈥?/a>


that there was a shot of mine .....














if this is what you mean... i use photoshop elements 4.0 you highlight the rigid line one around the places you want kept and select remove color and the rest will be removed its quiet simple but different for every photoshop read the instructions it will tell you how good luck mateHow do you change a picture to black and white but turn the eye and mouth color into a rainbow?
Photoshop, duplicate original layer make the copy black and white, select the lips and eyes then use a rainbow gradient.