[cflsystems]

This is what's there by default

{if $config.Appearance.subcategories_per_row eq 'Y'}
  {if $current_category.description ne ""}
  <div class="subcategory-descr">{$current_category.description}</div>
  {/if}
  {if $subcategories}
    {include file="customer/main/subcategories_t.tpl"}
  {/if}
{else}
.............
  {if $subcategories}
    {include file="customer/main/subcategories_list.tpl"}
  {/if}
.............

so you can do something like this

{if $config.Appearance.subcategories_per_row eq 'Y'}
  {if $current_category.description ne ""}
  <div class="subcategory-descr">{$current_category.description}</div>
  {/if}
  {if $subcategories and $current_category.categoryid eq "433"}
    {include file="customer/main/subcategories_t.tpl"}
  {/if}
{else}
.............
  {if $subcategories}
    {include file="customer/main/subcategories_list.tpl"}
  {/if}
.............

or the same for subcategories_list.tpl, depending on how you need it