sortlist, resolv.conf, DHCP client

[ms419@freezone.co.uk]

I need to add a "sortlist" option to my "resolv.conf". Unfortunately, 
it is periodically overwritten by my DHCP client. The "nameserver" 
options are not overwritten, using the "supersede domain-name-servers" 
option in "dhclinet.conf". What configuration will prevent my 
"sortlist" option from being overwritten?

Thanks,

Jack