[CentOS] resolv.conf question

Hello,

I have a centos 4.6 system acting as a router for my local network.  I
obtain my eth0 IP address automatically via DHCP from my ISP, sc.rr.com.  If
I add 127.0.0.1 to resolv.conf, it won't save it.  I tried adding this to my
dhclient.conf

lease {
    option domain-name-servers 127.0.0.1;
}

The above is the only entry in the file.

Don't know it caused it but my system locked up 3 times since adding this.
Deleted the file and its fine.

Any help would be appreciated.

--Eddie