Photoshop :: Delete Background Behind Hairs In The Wind

For long time I am trying to learn a trick in Photoshop. [I am on Photoshop 6 by the way, so please, don’t laugh. I am on Windows XP]

I am talking about background removal. I have thoroughly searched Internet for articles on this topic. I found many ways to remove an object from its original background. All those methods work just great. But, there is one think I never was able to accomplish. I was never able to delete background from within such part of the photo like hairs fluffing in the wind, or hairs ruffled by the wind.

I can easily separate an object with clear edges from its background. But how can effectively remove background from behind hairs on this photos?