Check it bro, as long as your MP3s are somewhere on your phone then the music player should find them. I connected my phone via USB as a disk drive and just drag 'n drop all my music into a "MY MUSIC" (which I created) folder in Internal Storage. The TF3D music player found all the music automatically. Very simple and takes all of 3 minutes.
As far as new icons, just try searching here or at
http://forum.xda-developers.com/forumdisplay.php?f=441
There are a ton of options available. Just be patient cause you'll have to sort through some stuff and do a good bit of reading. It'll be worth it though.