Macbook startup help

My Macbook (2.0 GHZ, 1 gb ram, superdrive) won't turn on correctly. When I turn it on, it says
"/ect/master/passwd: No such file or directory
-Sh-2.05 b# IOBluetoothHCIController::startIdleTimeStopped".
I have Boot Camp installed with Vista pre-RC1, and it still works, so its not a HDD failure. I can't find my OS X install disc. I don't want to wipe the drive and re-install OS X because I have a bunch of pictures and music on there. Does anyone know what is wrong and how I could fix it?
Macbook 2.0 ghz   Mac OS X (10.4.8)  

Try the instructions in this article.
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