Is there a way to add custom logic to Html.CheckboxFor, Html.TextboxFor, and other methods?

I am working with legacy models that wrap data and meta-data up in a single property. For the purpose of this question, suppose the interface is:

pubic interface ILegacyCheckbox 
{
   bool Value { get; set; }
   bool Editable { get; set; }
}

I want to wrap the CheckBoxFor() extension method with my own,

public static MvcHtmlString LegacyCheckboxFor<TModel>(
    this HtmlHelper<TModel> html, 
    Expression<Func<TModel, ILegacyCheckbox>> expression)
{
    // wrap html.CheckBoxFor() method here by extracting the Value  
    // property and check if Editable is false, in which case add 
    // an htmlAttribute of "disabled=true"
}

Is there a way to do something like this? Where would I start?

Any help would be appreciated,

Thanks,
Alex