Extract Data from Yahoo Finance

Hi R ?users,
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I am using R-2.14.0 on Windows XP.
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May I request you to assist me for the following please.
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I like to extract all the fields (example: a : Ask, b : Bid, ??, w : 52-week Range, x: Stock Exchange) ?for certain period of time, say, 1 October 2011 to 31 October 2011.
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Is there any R-Package(s) & any R- script please?
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Once again, thank you very much for the time you have given.
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Regards,
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Deb