I have a confession to make -- I am a member of Packrats Anonymous. PA is a 12-step program for those of us who find it difficult to part with anything, no matter how useless it may seem to others. You may have heard of some of our members, like the guy who saved bits of string, tying end to end until he had a ball of string over six feet high. He was not really trying to create the world's largest ball of twine; it's just that like the rest of us he never knew when a certain length of string might come in handy.