So I just put the
Rockbox on my mp3player and my god, I can't believe I didn't do this before. All my music through it sounds about 5x better and it even plays formats that the old software couldn't play. Shit, it even comes with fuckin minesweeper, pong, solitaire, blackjack and a hella lot of other shit! I've seen youtubes of people putting fuckin zelda games on it also. I highly suggest you slap this puppy on your player and give it a whirl! Also, I use a iTrip to plug the mp3player into the cigarette lighter to charge it and it has a radio station thing on it so you can listen to it through the car speakers and before I put the rockbox on it, it sucked but now its fuckin tight as hell!
btw, I have a sansa e250. Apparently the newer sansa's don't work with it but luckily mine is old.