For 1.7.2 I'm using simple solution. Works on logged customers and guests.
<?php
class ProductController extends ProductControllerCore
{
public function process()
{
parent::process();
$cenaKatalogowa = 0;
$spec_price = 0;
$cenaKatalogowa = $this->product->getPriceStatic($this->product->id, false, 0, 6, null, false,
true, 1, false, null, null, null, $spec_price, false,
false);// <------ this is what you need to see price without group discount
$this->context->smarty->assign(array(
'cena_katalogowa' => $cenaKatalogowa,
));
}
}
Change 'cena_katalogowa' to base_price or 'raw_price and in 'product.tpl' you can use {$base_price} or {$raw_price}
Did not tested with other type of discount.
How to use:
1) make new file ProductController.php (or open existing) in ps_root/override/controllers/front/
2) put content inside (or add it if you already have controler)