Where do I set another DNS server?

I am on cable, DHCP and would like to use another DNS server than the one 
assigned by my ISP.

I would heve entered them in the general setup and disabled 
"Allow DNS server list to be overridden by DHCP/PPP on WAN"

but was told on IRC I would rather have to use a DNS forwarder.

Which one is correct?

Next thing: if forwarder is correct, which ione? There are two options and I 
can't even understand why:

Host	Domain	IP	Description	

and

Domain	IP	Description

"Domain" means all my computers and "Host" only one machine on my net?


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