As the Rangers have marched through the regular season, coach John Tortorella and his players have preached the need for everyone to buy into the team's philosophy of total commitment at both ends of the ice. The formula clearly has worked, as the Black-and-Blueshirts clinched home-ice advantage in the first round yesterday, and could wrap up the top spot in the Eastern Conference as soon as tonight, when they take on the Bruins at the Garden. But for anyone searching for proof this mindset has permeated the entire roster, look no further than the Rangers' leading scorer, Marian Gaborik. Not only is Gaborik third in the NHL with 39 goals this season, but he has willingly thrown himself into the Rangers' do-whatever-it-takes mentality.