Head over to the FFR Batch Forum for all the details on how you can get your file into the game. The Artist Permissions forum section will help you find out if FFR has permission to use the song your file goes with.
I put one of my first simfiles in the FFR SIMFILES the other day and I'm not getting too much feedback on that so check it out if you're bored. It's the classic Dr. Mario song Fever and it is not too bad.
