Uh oh, looks like a nackered disc. Have you tried cleaning it? (soft cloth with NO abrassives!) are there any really nice big scratches on the disc surface?
My own disc got a deep scratch on it after being lent to a friend, he found it in his cuttlery draw (?!?!?!?!?) and it had a hole in the disc surface, you could see clear through it and out the other side. Didn't work after that.... Got a similar message about some file error while processing
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Actually, you sure you got enough HD space? may simply have run out of room to install, could be
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Fingers crossed
Thu11s