i have worked a lot w/ the strand 300 series board... the one i worked w/ did not have the extra fader, but i did at one point look into it.... the extra faders are ment to be for individual channels.. if that helps you out.... as far as programing i would conrtact the store you or your theatre bought the board... they may have a little more insight on how to program the faders... other wise i would assume you would program them like a submaster.