Today I figured out how to make an image that looks like hair or scratches using Photoshop CS4. So, I decided to share with all my friends and fans (both of you).
First, I’m not sure if this will work in any other version of PS, so YMMV [1]. If you know of a different/better/easier way of doing this, feel free to share!
Also, I’m assuming you have some familiarity with PS. If not, no worries, this should be easy enough for you to understand, too.