Update checkout

app/design/frontend/base/default/layout/checkout.xml

@@ -472,7 +472,7 @@ One page checkout order review block
     <checkout_onepage_success translate="label">
         <label>One Page Checkout Success</label>
         <reference name="root">
-            <action method="setTemplate"><template>page/2columns-right.phtml</template></action>
+            <action method="setTemplate"><template>page/1column.phtml</template></action>
         </reference>
         <reference name="content">
             <block type="checkout/onepage_success" name="checkout.success" template="checkout/success.phtml"/>