It takes about 6 to 10 minutes to install....
The "Default" airplane when you first start it up is the "Thunderbolt Sbach 35%"....
Real Flight makes it super easy to tweak and modify the default planes.....
Click "Aircraft"... click "EDIT (Name of Active Model Here)" and you can get right into tweaking to your personal preference!!
I moved the CG back an inch, changed the "Vehicle Graphical Scale (%)" to 185 and increased the Elevator deflection to 45 degrees.... (Oh yeah... change the Prop Graphical scale too if you want it to look right!!)
That right there makes the default Sbach pretty dang good!!