Half of PS I Love You left home. Paul Saulnier and Benjamin Nelson raised their band from Kingston's lowest places, raised it higher than basements and bars and late-night pits of the heart, higher than the ''Muster Station'', above the swirling fog of death dreams and depression, until this two-piece rock 'n' roll act was like a black and red corona setting St. George's aglow. And then while Nelson minded the fort(s), Paul left home - to Toronto, following his heart. ''For Those Who Stay'' is PS I Love You's third album, and it was made after Paul quit Kingston for a different big smoke. It was encouraged by the girding strength of love but of course it's still dredging and confused, of course it's still resplendent in its churn. Of course the band had to go back to Kingston to record it - working at a place called the Bathhouse, the duo's first time in ''a proper studio.''