Yes there is.. It plays quite a lot of games really well, though like any emulator it isn't 100% of games. http://www.xbox-hq.com/html/modules.php?name=Xbox_Homebrew&op=view&gid=43 The hard part is getting the bios (the right one for the region of the game is essential) and making the .img file from an original game. Other than that it's a nice emulator, pretty easy to set up, and plays most ps1 games pretty well.. but NOT the final fantasy series, they use some kind of graphics overlay system during the fight sequences that the emulator can't handle... If you want to play those get a pc emulator or buy a ps1.
