[Holub]

Yes, you can do it.

First of all you should create file in root dir called "change_ppp.php" with this code:

File "change_ppp.php":

<?php

if ( !defined('XCART_SESSION_START') && ($REQUEST_METHOD != "POST")) { header("Location: home.php");}

require_once "auth.php";

x_session_register("products_per_page");

if ($REQUEST_METHOD=="POST")
	if ($ppp) {
		$back = $_SERVER['HTTP_REFERER'];
		if (!$back)
			$back = "/home.php";
		if ($ppp == "all")
		  $ppp = 32767;
	  $products_per_page = $ppp;
	  x_session_save("products_per_page");
	  func_header_location($back);
	}

if ($products_per_page) {
	$config["Appearance"]["products_per_page"] = $products_per_page;
	$objects_per_page = $config["Appearance"]["products_per_page"];
}
$smarty -> assign("products_per_page",$config["Appearance"]["products_per_page"]);

?>

Next step:

include into "auth.php" before end of file (?>)

include "change_ppp.php";

Next step:

include into /skin1/customer/main/products.tpl

<form method="POST" action="/change_ppp.php" name="product_per_page_form">
Show products per page
<select name="ppp" onchange="javascript: document.product_per_page_form.submit();">
<option value="5" {if $products_per_page eq 5}selected{/if}>5</option>
<option value="10" {if $products_per_page eq 10}selected{/if}>10</option>
<option value="20" {if $products_per_page eq 20}selected{/if}>20</option>
<option value="30" {if $products_per_page eq 30}selected{/if}>30</option>
<option value="50" {if $products_per_page eq 50}selected{/if}>50</option>
<option value="75" {if $products_per_page eq 75}selected{/if}>75</option>
<option value="100" {if $products_per_page eq 100}selected{/if}>100</option>
<option value="all" {if $products_per_page eq 32767}selected{/if}>all</option>
</select>
</form>

after

{* $Id: products.tpl,v 1.72.2.3 2006/11/27 11:40:25 max Exp $ *}
{if $active_modules.Feature_Comparison ne '' && $products && $printable ne 'Y' && $products_has_fclasses}
{include file="modules/Feature_Comparison/compare_selected_button.tpl"}
{include file="modules/Feature_Comparison/products_check_js.tpl"}
{/if}

This modification allows customer to select products per page and selected value will stored in session variable.

You can change this code as you want. I've checked this code and sure he works correctly.