Error while trying to extract photos using WinRAR

Hi all,

My friend compressed lots of photos into a zip archive using a Mac Book, and uploaded it to Drop box.

I downloaded the zip and when I try to extract using WinRAR, it gives this error, but extracts most of the files:

WinRAR: Diagnostic message

Message

C:DownloadsSimonINDIA2011.zip: The archive is corrupt

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When I try with 7-Zip, it gets stuck and gives this:

0    Unsupported compression method for 'DSC02999.JPG'.
1    Unsupported compression method for 'DSC03000.JPG'.
2    Unsupported compression method for 'DSC03001.JPG'.
3    Unsupported compression method for 'DSC03002.JPG'.
4    Unsupported compression method for 'DSC03003.JPG'.
5    Unsupported compression method for 'DSC03004.JPG'.
6    Unsupported compression method for 'DSC03005.JPG'.
7    Unsupported compression method for 'DSC03006.JPG'.
                             
                                                                            Close

My OS is Windows 7 Home Premium 64 bit.

Please suggest a way to me.

Thanks.