@taffy,
regarding mode #chan +k some_key to add a pass to a channel.
without testing, try this
in your irc channel, type: /mode #chanName +k some_key
in ezirc admincp where you add the channel name, add a space and then some_key behind the name
so where it says: channel name #: poseidon
replace with channel name #: poseidon some_key
maybe we get lucky and this works