Sure. Go to StyleVars, and set the width to 100%.
Go to the Footer template, and find this code:
Code:
<table width="964" border="0" cellpadding="0" cellspacing="0" align="center">
<tr>
<td><img src="redbar/elements/footer1.jpg" border="0" alt="" /></td>
<td background="redbar/elements/footer2.jpg" width="100%"></td>
<td><img src="redbar/elements/footer3.jpg" border="0" alt="" /></td>
</tr>
</table>
Change the width from 964 to 100%.
Go to the Header template, and find this code:
Code:
<table border="0" width="964" cellpadding="0" cellspacing="0" align="center">
<tr>
<!-- nav buttons bar -->
<td background="redbar/elements/catsub.jpg" height="24" class="menu">
And change 964 to 100%.
Alternatively, I should have probably changed 964 to $stylevar[outertablewidth] which would all you to set this by the StyleVar, but I think I had a padding issue on the footer corners. Anyway, there you go, 100% fluid style.