All About Stenciling

How can i create this affect in photoshop? I want to create stencils for pictures like these http://i16.ebayimg.com/04/i/000/90/... http://i5.ebayimg.com/03/i/000/8a/8... http://i9.ebayimg.com/04/i/000/90/d... I there any way to create this sort of affect using photoshop 7? If not can anyone recommend any software?

Can't link to examples

I can't open your links but you can try Adobe Illustrator for tracing over images