Does anyone have the sheet music for Passion for violin or french horn?... I've tried looking for it, but failed. And.. if anyone has easier piano parts for Passion from here http://forums.ichigos.com/showthread.php?p=232182 please do give me a link or so. Thank you.

That's the beauty of piano parts - you can just play the treble clef - the melody section -- if that's what you're looking for.