Failing "yum --installroot=/mnt groupinstall base"

[jesse.waters at gmail.com (Jesse Waters)]

Hello all,

trying to do the below command.

 yum --installroot=/mnt groupinstall base

i receive this error message.

"You have enabled checking of packages via GPG keys. This is a good thing.
However, you do not have any GPG public keys installed. You need to download
the keys for packages you wish to install and install them.
You can do that by running the command:
    rpm --import public.gpg.key"


I have already imported the gpg keys in:
/usr/share/rhn/RPM-GPG*
/usr/share/doc/centos-release-4/RPM-GPG*

I can yum install <package> without issue
but when I try the groupinstall option it fails

any suggestions?

Regards,
 Jesse Waters