You add in the IF statement like we did in the module but you need to add it to the template using your templates and overrides ...
Look at the code in the tpl_checkout_payment_default.php and you can add:
Code:
<?php if ($order->info['total'] < 100.00) { ?>
<div class="alert"><?php echo 'WHERE AM I < 100.00 ' . $order->info['total']; ?></div>
<?php } else { ?>
<div class="alert"><?php echo 'WHERE AM I >= 100.00 ' . $order->info['total']; ?></div>
<?php } ?>
<br class="clearBoth" />
</fieldset>
<?php // ** BEGIN PAYPAL EXPRESS CHECKOUT **
the red code above the black code and fool with that ...