Text help

I need some help formating some text. A couple things need to happen, first some of the letters of INTRODUCTION let say INTRO need to be a different color, second I have another case with WELDING & FABRICATION, where the ampersand needs to be a different font. How can I accomplish this?

This is the code in the first frame of my movie.

[URL=“http://www.kirupa.com/forum/misc.php?do=bbcode#as2”]


// change title 
_global.changeTitle = function(title:String) {
    // set chapter text
    _root.chapter.title.autoSize = true;
    _root.chapter.title.text = title;    
};
changeTitle("INTRODUCTION");

My menu consist of 10 movieClips and each menu item is setting the changeTitle parameter. For example my Welding movieClip:

[URL=“http://www.kirupa.com/forum/misc.php?do=bbcode#as2”]


on (release) {
    changeTitle("WELDING & FABRICATION");    
}