farei senza tabella...così:

<html>
<head>
<title>Untitled</title>
<style>
.testa {
text-align:center;
width:300px;
border:1px solid black;}
.cor {
display:inline;
border:1px solid black;
width:100px;
text-align:center;}
</style>
</head>

<body>

<div class="testa">intestazione</div>
<div class="cor">testo</div>
<div class="cor">testo</div>
<div class="cor">testo</div>


</body>
</html>