FSBuild and Reality Xp GPS 530

I am starting to get the hang of these items now...One question I have is lets say I have the real air Marchetti sf.260Which I just got muuahhahh.. This thing is sweet love the flight characteristics landing etc..Someone stop me I am getting out of Cntrl with this Simming..Ok back to the biz..What my question is. Is there a way to implement that plane in FSBuild weight and specs etc.. So I can plan off of thatWondering if anyone knows of any tricks or something..One things for sure I am tired of the ATR stuck in my flight plans that out weighs my plane by about 100 times..And carries more fuel in the injectors than the Marachetti holds in the tanks... Thanks All,P.S. How do you also get the FSBUILD to create the altitude settings for you from E. to W. etc.. I have left the right box blank and put it on RSVM and put FL in the box to the left etc..Tried numerous things in the alt box beside telling it my flight level, which I figured it would determine it for the route I am flying.. Thanks Again Fellow Simmers And Pilots