replace default contacts images

This may seem small compared to losing all contacts or something, but it makes me batty. I would like to add an image to a contact card in "Contacts."

Yes, I know how to add a default image, but what good is placing a #@$%# basketball or a snowflake going to do??

And how stupid is it that the camera option is ready to take a picture of me?? So every contact in my Address Book will have a picture of me? Who thought of that?

I want:

A) an image of my friend (duh). I may not have it in iPhoto. It may be something I screenshot off of FB. A picture.

or

B) a map -maybe instead of a face, I want a picture of a building where they work or a map pic to their home, this would actually be useful.

I do not want, and cannot imagine a use for, a random image of a flower. Was somebody high when they created these options?

So can somebody tell me how I can go to wherever those dumb images are stored, in whatever library or folder, make them visable, delete them and replace them with images I would actually use?

TIA.