Как добавить тип товара для всей категории товаров? - [VM1] Общие вопросы и ошибки

I needed this too, and in my case I only have one product type. 

Another way to do the same thing (without any hacks) is to go to Product Type List, and under the Products column click on Show to display the products associated with that product id. You can then add a new product and it will have that product type already activated. Do not use my hack if you plan to use more than one product type, because my hack forces a single product type.  

I am using Joomla 1.5.8 with VM 1.1.2. Here's what worked for me:

Open /administrator/components/com_virtuemart/classes/ps_main.php

Right at the beginning of the file and right after this first line:
Code:
if( !defined( '_VALID_MOS' ) && !defined( '_JEXEC' ) ) die( 'Direct Access to '.basename(__FILE__).' is not allowed.' );

Insert this:
Code:
$_REQUEST['product_type_id']=1;

In this case, my product_type_id is one. You can double-check this in phpmyadmin, however I believe if you have only added one product type it will have an ID of 1 by default.

Would be nice for this to be an option in the main store config, or in the product types area.