Digital BW, The Print

>  I have a question about how to take silhouette pictures on a digital 
> camera using the black and white color option.

May I suggest you consider taking the pictures "in color." By doing so 
you will have more contol and flexibility for creating a more dramatic 
result by converting them to BW using one of several methods possible 
in Photoshop, assuming you are using Photoshop.

If you shoot the pic as "BW from the camera," your options are more 
limited.

For a silhouette image you will need a lot of "back light." For example 
if shooting outdoors during the daytime you will want the sun to the 
subject's back.

Does this help?

~Danny~