I prefer to store all of my album art in a single location. Music is stored in \Artist\Album folders. I've been using this string so far, and it works great for 90% of my albums:
CODE
C:\Documents and Settings\Kristin\My Documents\My Music\MP3 Albums\Covers\[%Album Artist% ~ %Album% ~ Cover*.*]
--components\default.*
--components\default.*
The problem comes in when there are special characters in the Album tag that aren't allowed in the file name. Is there some way to tell it that if it doesn't find a file using the above convention, to use name of the folder the song is in rather than %Album%?