Super Mario 64/Big Boo's Haunt

To get there. Follow the big boo (If you have enough stars) and walk out the door. Search all the Boos until you find The one with no coins but a black little thing. (It contains the course.) Now i know how to beat the 1st part. Kill all the Boos in the level until you get a message. (Not the one that says "Ghosts! Don't Die!") now run to the lobby and you should fing Big Boo attack him in the back until he's gone. You should get the star.