Right, this will not work if you dont have a tape player. you will need,
a car tape player
a psp with music or videos or whatever
a ipod/mp3 in car converter

steps:

1. put your ipod/mp3 tape converter in your tape player
2. swich your psp on and put it to zero volume
3. plug the wire that came from the tape into the headphone jack
4. put on a movie, play a game or play some music and enjoy!