Dynamically adding checkboxes from multi-select jQuery UI widget

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Javascript

jQuery

jQuery-UI

I'm using Eric Hynds jQuery MultiSelect Widget that is being populated from a javascript file. I'm trying to dynamically attach a checkbox with the value of the selected checkbox to a 'Main' checkbox If a 'Main' is checked. When added the value will already be checked, allowing user to uncheck. To help illustrate with comments inside: http://jsfiddle.net/3u7Xj/7/

References:

<select id="select" multiple="multiple" class="multiselect">
</select>
<input type="checkbox" name="chkMain1" value="Main1" 
     id="Main1"><label for="Main1">Main1</label><br />
<input type="checkbox" name="chkMain2" value="Main2" 
     id="Main2"><label for="Main2">Main2</label><br />
<input type="checkbox" name="chkMain3" value="Main3" 
     id="Main3"><label for="Main3">Main3</label><br />

Populating drop down widget from js file:

var MYdata=[{"Value":"1","ValueText":"name1"}
              ,{"Value":"2","ValueText":"name2"}
              ,{"Value":"3","ValueText":"name3"}];

$('#select').html(function(){
   return $.map(MYdata, function(v) {
      return "<option id='"+ v.Value +"'>" + v.Value + "-" + v.ValueText +"</option>";
   }).join('');
});

Concept of dynamically adding checkbox on check/click: http://jsfiddle.net/KPkJn/9/

Any help would be greatly appreciated.