How to change a photo to black and white, but leave something in color?

how do you change a photo to where (ex) only your eyes are colored? and the rest is black and white?How to change a photo to black and white, but leave something in color?
you can do it on flicker but its kinda tricky. all u have to do is click on black and white and use the focal area only tool and keep doing it until the only thing left in color is your eyes.How to change a photo to black and white, but leave something in color?
go to google.com and enter in picasa and do the free download. and then its self explainatory from there.
You need Photoshop.



In Photoshop Elements: Have your background color photo. Make another layer exactly like that one (Cntrl J) and change it to black and white (adjustments, black and white). Now the top layer will be black and white. go get the eraser tool and erase the part you want colored in. (you may have to ';link'; the two layers by shift clicking on both and right click to link, I'm not 100% sure



Here's a tutorial: http://www.taylormade-designs.net/2008/0



Or if you have Photoshop CS3, then make a black and white layer over the colored layer and on the black and white layer, click on ';layer mask'; it looks like a rectangle with a circle in it. Color everything you want colored with a black brush with 100% opacity. If you make a mistake you just color it in white. LOVE masks!
www.picnik.com

then click the get started now button

next in the left hand side there will be a button that says upload photo

click it upload your photo by clicking the photo you want in your documents.

then click the button near the top that says Create

then change it to black and white and then color your eyes with Tint. and you should be goodd to go.