well, both stars would be exorting gravitational force on each other, and if same size, both would pull into each other, causing either a huge explosion, or make the start go into super giant stage, and if one bigger than other, the smaller one will orbit the bigger one
S=Star R=Runescapes Planet Lg=Leaps' Gas Giant [s2]= star 2
it works like that.
Anyways, i make my gas giant emit enough heat that, combined with the heat of star one, makes Alpha b habitable. i also create an asteriod belt around 8 AU