shouldnt be hard to colorise it, il have a fiddle later when i can spare a few minutes.
Ok ive done it but every hosting place keeps refusing to let me show it,
Its very easy actually, and can be described quite easily.
Change mode to cmyk, then just lasso or use the layer mask to highlight areas, then make a new adjustment layer > curves, and select the channel colour and move the curves, whaaala colour.
Just need to fiddle a bit to get the right colours.
at last
this took about 10minutes.
http://img.photobucket.com/albums/v695/chronic99uk/colour.jpg
couldnt be bothered to finish it,

not very good with guessing colours either, Look at a normal picture and use those colours.