Ok, since the above is not working for me, here’s a hack that i found out :
edit the file: root/app/design/frontend/default/default/template/catalog/product/price.phtml
find all the instances for the follwoing lines of code:
<span class="label"><?php echo Mage::helper('tax')->__('Excl. Tax:') ?></span>
<span class="price" id="price-excluding-tax-<?php echo $_id ?><?php echo $this->getIdSuffix() ?>">
<?php echo $_coreHelper->currency($_exclTax, true, false) ?>
And Comment the Whole Code! (notice the <span class="price-excluding-tax"> which is common )
I am not sure this is the best method but it Works For Me!!!!