Huh...?
Is this another question on how to automatically add files that "magically" appears on your computer...? That has been discussed before. My take: If drag and drop is to hard then don't bother...
As for cleaning up: You can always tell iTunes to manage your library and use the Consolidate Library function (under the Advanced menu) to clean up a bit...
Or you could check out
Doug's scripts and see if you find anything that does what you want...