Making Search.module Accessible

Hello, I am trying to make the search.module accessible. One thought is to work directly from the drupal source (modules/search), a second one is to work based on a theme (mydrupal_impact 5.x).

The code is the following:

<form action="/search/node"  method="post" id="search-block-form">
<div><div class="container-inline"><div class="form-item">
 <input type="text" maxlength="128" name="search_block_form_keys" id="edit-search-block-form-keys"  size="15" value="" title="blah blah blah" class="form-text" /></div>
<input type="submit" name="op" id="edit-submit" value="Search"  class="form-submit" />
<input type="hidden" name="form_token" id="edit-search-block-form-form-token" value="8a15e048c1d3b4452f03b00712a72842"  />
<input type="hidden" name="form_id" id="edit-search-block-form" value="search_block_form"  />
</div>

The errors encountered are descrived here: http://webxact2.watchfire.com/themes/standard-en-us/help/HIDD_WDContent_G41.html

I think i need something like an extra line including the LABEL element, unfortunatelly i do not know how.
So, any ideas about how i could implement my own code for the search module?

Any help would be greatly appreciated.