[CentOS] trying to recompile

Jim Perrin wrote:

>
> Once you've done what he suggested, You should install the kernel
>from centosplus as it has XFS support built in. No need for you to
>build anything. You can do this with "yum --enablerepo centosplus
>install kernel"
>  
>
Ok sorry for the beginner question, but what do I have to do next?
I have only ever recompiled kernels never installed through yum. How do 
I start to use the centosplus kernel?