Tom Tykwer's involvement in Goodbye Lenin!

Goodbye Lenin! is one of my favorite films, and I wrote about it in this blog (Good Bye Lenin! East Germany portrayed in "GoodBye Lenin!"). I was watching the commentary the other day, and I learned that Tom Tykwer took a part in the making of Goodbye Lenin!. I was quite pleased about that, as Tom Tykwer is becoming one of my favorite film directors. From what I understand Goodbye Lenin! did not have huge budget like many Hollywood Blockbuster films, but the film managed to get a lot of talented people including Tom Tykwer.