Script or Program do remove dublicates in iTunes without touching playlists?

Hey Guys!
i need a program that can remove dublicates from my iTunes library.. (yes i know alot of programs does this) but i want to be able to filter out the songs from my playlists? so it only removes all those i dont have in a playlist, because i have alot of playlists, and it would suck to remake all of them, as i used 3 years making all those..

Hope you can help me

PS. Maybe the program can be able to put another of the songs into the playlist where it removes the song from?

Thanks in Advance
- Mathias

 

Exactly what i needed! Bought it and already using.. THANKS!