Cool idea! I did something like this once already only i left only my self in colors, that was much more easy than this one The hair over eye is brown But that would be too sick do paint it, but i think thats possible
actully i changed the hair over the eye to gray also, its very very hard to tell at this resolution, but if you look close enough you can tell but it looks weird, its like a single pixel line of gray. You can really tell it on my high resolution .PSD file. Doing the hair was really hard because it will like 2 pixel thick and 3 at MAX. So yeah it does not look so good at this resolution but oh well... im happy how i did come out
I did a drawing like this once for an art class (my way of getting away from drawing the human form which i'm dreadful at!) Its so great to see an actual photograph like it. I love the way you've brought out the main parts of colour and lefts the others grey its a great idea.