Software for burning AAC files to MP3 CDs? iTunes is lacking some features I could really use for burning MP3 CDs for the car audio system. 


Ability to convert AAC to MP3
Ability to group non-album songs into folders


In itunes, the process appears to be:


find all the songs you want to burn to an MP3 CD
figure out which songs are not in MP3 format
tell itunes to make duplicate versions of these files in MP3 format
figure out which are now the MP3 versions and drag them into a playlist
edit the copied MP3s' meta data to 'fake' a new album so it's grouped on the CD correctly


Is there a piece of software that can do what I'm looking for and/or is there a way to do what I want in iTunes that I'm somehow missing?
If you change the Import CD As... to MP3, you should be able to convert any non-MP3 files to MP3. The same applies to all the supported file types.