Generating a List of One Category and Its Subs

I’m looking to make an archive listing of just a particular category and its subs. I’m helping someone who runs a political site take all the Election 2008 categories and list them in one place — and also exclude those categories from the other category listing (though that’s a different issue). He’s made all his Election 2008 categories subs of that top category. I’m wondering how I modify the Category Listing widget to achieve that (I’m going to try to paste the code, but I’m not hopeful it will work properly…here goes):

<MTIfArchiveTypeEnabled archive_type="Category">
<div class="archive-category archive">
    <h2 class="archive-header">Election 2008 Categories</h2>
<div class="archive-content">
<MTTopLevelCategories>
    <MTSubCatIsFirst>
    <ul class="archive-list">
    </MTSubCatIsFirst>
    <MTIfNonZero tag="MTCategoryCount">
        <li class="archive-list-item"><a href="<$MTCategoryArchiveLink$>" title="<$MTCategoryDescription$>"><$MTCategoryLabel$></a>
    <MTElse>
        <li class="archive-list-item"><$MTCategoryLabel$>
    </MTIfNonZero>
    <MTSubCatsRecurse>
        </li>
    <MTSubCatIsLast>
    </ul>
    </MTSubCatIsLast>
</MTTopLevelCategories>
 </div>
</div>
</MTIfArchiveTypeEnabled>

Any help with this would be appreviated.