downgrading kernel during first yum update

[Jack Howarth]

   I will likely be installing the x86_64 FC6 DVD release on
a new dual Xeon quad core system next week. However, I have
noticed at least one of our machines with i386 FC6 installed
has network problems under the new 2.6.19-1.2895.fc6 kernel.
Is there some way that I can force 'yum update' to skip that
kernel release when I do the initial 'yum update' on that
newly installed machine? I would like to be able to force it
to install the previous 2.6.18-1.2869.fc6 kernel release
instead. Thanks in advance for any information.
               Jack