In Photoshop CS2, How do I make only parts of image have color?

I think it really cool when pics are like that, but i cant figure out how to do it!!





I also have Picasa, in case anyone knows how to do it there?In Photoshop CS2, How do I make only parts of image have color?
You use quick mask mode to paint what you want to color then click back to standard mode then select tab- inverse selection then image tab- adjustments-hue/saturation-check colorize box and slide sliders.





If you don't want to see the dotted line go to view tab and uncheck extras.In Photoshop CS2, How do I make only parts of image have color?
Photoshop:


1.With your color image out in your workspace, go to Image heading at the top, and click on it. Just barely scroll down, in the drop down menu, and you'll see Mode, click on it. Now scroll down in the 'fly-out' menu, and click on Grayscale. Yes, you want to delete the color. Go up to File, scroll down to Save As, click on it. In the window that appears, give this new grayscale image a name, then click the red x, and close it. Now you have the original with color, and the grayscale,(it's sort of like black %26amp; white photo). Go back in Adobe Browser, and take out the color version. Go up to your Tool Menu on the left, and click on the Magnetic Lasso Tool,(it may say Lasso Tool when you hover your mouse cursor over it, just right-click on it, then left click on Mag. Lasso Tool, in the 'fly-out' menu.) Now with the Magnetic Lasso Tool you will touch the point of the tool, to the outside edge of the color part, you wish to put in the grayscale image, for example, mouth, eye's, etc. Left-click on this edge then slowly,(not to slow, not to fast, experiment!), move the Mag Tool around the outside edge. You'll see magnetic Anchor Points every so often 'pop-up' as you go along. If the tool deviates from the edge you wish, just move the tool back towards the last anchor point you want, and press either the Backspace key, or the Delete key to undo it. You will now start again from this anchor point. It get's easier as you use the tool. When you have gone all the way around the color part of the image you want, you'll see a small empty circle appear. Look close. Click at this time, and the 'Marching Ants' will form around your color part,(you'll see what I mean!) If you have difficulty seeing the empty circle, or just can't quite get it, and you're close to the first anchor point,(real close!), just press the Enter key. Go up to Edit, click on it, and then scroll down to Copy, and click on it. Now pull the grayscale image out into your workspace, so that you have both image's out. Go up to Edit again, this time scroll down, and click on Paste. Use the Move Tool in the Tool Menu, to move the color part you copied, around to where you want it in the grayscale image. Then up to Layers, down to Flatten Image, and click on it. Go to the color image,(use your mouse cursor, click and drag the grayscale image out of your way a little, so that you can click on it's frame to activate it, or go to the Layers Palette at the right, and click on the color image, to activate it.[if you don't see the Layers palette, go up to the Window heading, click on it, then down to Layers, click.],and activate it. Go up to Edit, down to Step Backward, and click on it. This get's rid of the 'Marching Ants' so you can use the Magnetic Lasso Tool on a different color part you want to copy. This is the basic procedure. Just go thru it for each color part you want to put on your grayscale image. I use the Magnetic Lasso Tool, because I can get real close to the outside edge, and copy it.