install CENTOS 5.4 X86_64 failed???

[mcclnx mcc <mcclnx@xxxxxxxxxxxx>]

I just download CENTOS 5.4 DVD ISO X86_64 version from internet.  I tried to install it on DELL server and get following error message before RPM start install:

   parted_1.8.1-23.els.x86_64.rpm can NOT open

anyone know why?

Should I download it again from any good site?

If I install CENTOS 5.3 and use yum update, will it go to CENTOS 5.4?

Thanks.



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