How can i Modify Member's page ?

Hi,

On the defult dolphin template main page i MEMBERS next to HOME page.

on my memebr's page there is a search feature which asks for age, sex and the country .  How can i disable that search feature from showing my my members are?

OR

is there anyway i could modify to meet my criterial . ie, search by nickname ?

However, i prefer to get rid of it.

Is there a file that i have to modify or diable?

Please help.

Thanks