Seperate pre-loaders?

HI, i have learnt to use a pre-loader at the beginning of my films but i want to know how you make it load the first scene then when u click a button it loads the destination of that button
eg.
the button code wood be:

on(release) {
gotoAndPlay(“scene2”, 1);
}

How do u make it load that scene when u click the button?