// *** THE METHOD *** //
Element.implement({
    
    loadSwiff: function(path, options){
        var swiff = new Swiff(path, options);
        this.store('swiff',swiff);
        swiff.inject(this);
        return this;
    }
    
});

// *** USAGE *** //

$('load').addEvent('click',function(){
    $('test').loadSwiff('http://ryanflorence.com/test.swf',{
      id: 'test_movie',
    width: 550,
    height: 200,
    params: {
        wmode: 'transparent'
    }
    }).addClass('swiffified'); // the whole point is to chain it like so
    
    $('log').set('disabled',false);
    $('load').set('disabled',true);
});

$('log').addEvent('click',function(){
    console.log($('test').retrieve('swiff'));
});

<h1>loadSwiff Test - The element should have a flash video loaded into it</h1>
<p>
    <button id="log" disabled="true">Log swiff object to console</button>
</p>
<div id="test">
    <button id="load">Load Swiff</button>
</div>

body {
    font-family: Helvetica, arial;
    background: #fff;
}

h1 {
    color: #0094d5;
    margin-bottom: 1em;
}

div#test {
    border: solid 5px #e40053;
}

MooShell