The gentleman above, mem1, mentioned one of my favorite sites, terraserver. they have the whole united states in aerial photo and quad sheets. Any of these can be exportes in a georeferenced state and imported directly into your drawings. Provided that is that you are using a state plane or...
I don't know where you got your image from, but if you can get an image that has a tfw or jpw extension you can import it into your drawing and it will come into the drawing geospatially referenced and to scale. I used to have a lisp routine called tifin.lsp that would bring images in at the...