How do import swf's from sites like Flashden.net into my existing FLA

I downloaded a text scroller from flashden.net.  It gives me a swf file with some supporting files and folders (also gives me a fla of it).  I put all that stuff in the same folder as my fla project.  The instructions say I can just drag it onto my fla and it'll work, but I can't figure out how to do it.  I don't know what it wants me to drag onto it.  I've tried using actionscript (3.0) to load the swf, like I've done before, but nothing shows up.  Anyone know how to make it work by dragging it in.  Sounds so simple if I could figure out what they're talking about.  Thanks