Does anyone know what I need to do in order for my readers to be able to auto-install Twitter backgrounds I put together.
Here is an example of what I am trying to do: http://justfreebackgrounds.com/twitter/inception-twitter-background/
Did you try [google](http://www.google.com/search?q=twitter+api+background)?
I don't know anything about twitter or its API so I can't help you any more than this. I did notice, by the way, that on their API wiki they say something about Basic Auth being discontinued very soon, so perhaps the code in the first link above won't work, as it doesn't use OAuth.