[CentOS] Local yum repository

Hi All,

i have a local repository configured for 'yum',which have files copied 
over from the RHEL DVD,It was configured initially,as i was facing some 
issues with my NIC which was not supported on 2.6.18 so had to upgrade 
to 2.6.26.
Now as all is working fine and i'm on net i want to disable that 
repository and just use the rpmforge repository configured on my system 
following directions from
http://wiki.centos.org/AdditionalResources/Repositories/RPMForge?action=show&redirect=Repositories%2FRPMForge

Please help me out
-  Disabling the local Repo
or by
-  Any method to keep it up to date ,[syncing it with some online 
repository]