Sorry man, impossible, you would have to install a homemade headphone input.
Here are some instructions,
1.Get an old mp3 player
2.Remove the Headphones Input
3.With the headphone Input attach to Pendrive
4.Get hammer and smash until both are completly united
5.Press play..Oh wait Pendrives dont have Play button..
6.Repeat Step 1 Through 5 again, until you have reached Device Desired.
yes you can, but you need a computer to plug it in to.
put your songs on it, plug it into a computer, and start playing them
not any better than just having them on the computer in the first place though