how can i convert from alac to mp3 and export to artist/album hierarchy

I am trying to populate a 32GB SD Card with music to listen to in my car. My itunes library is largely in apple lossless format, but the car stereo does not play that format.

I have created a playlist of all of the music I'd like to have on the SD Card (but its in apple lossless format).

So what I'd like to do is:

a) Bulk convert a large number of apple lossless files to MP3.

b) Export the MP3 files to an external Finder folder, organized in Artist/Album hierarchy

c) Delete the MP3 files from the itunes library so as to have just the apple lossless version maintain in the itunes library

Sounds pretty simple, but I'm having a devil of a time trying to figure it out.

I can find a way to do the conversion and export the MP3 files (and subsequently deleted from the itunes library), but they will not be organized by Artist/Album in the Finder folder.

Similarly, I can export a bunch of files from itunes to a Finder folder and have it be organized by Artist/Album.

I just can't do one followed by the other.

I suppose this would also work if instead of exporting the newly created MP3 files, it would establish a new playlist in itunes with these. Then, I could just export them and have them then organized by Artist/Album; and then I could delete all of the MP3 files in the playlist.

Any thoughts or ideas on how to accomplish this goal? (I do know the manual way of doing this, but am trying to figure out a faster, more elegant way).

M