To generate a password, add these two lines of code in your project:
var generator:Generator = new Generator(10); addChild(generator);
This code will generate a password from letters and digits, with a total length of 10. If you want a password with letters only, do it like this:
var generator:Generator = new Generator(10, false); addChild(generator);
I created a demo, so you can see what you can do with this package.