title: Magento mass-assign products to category
body: <p>As the title says,i need to mass-assign products to a category and from the admin i can only edit one product at a time; i dont know why it just doesnt work to mass add them from the  "category products" tab in the category page. <br>
  Thats why i need another method that's fast,like using phpMyAdmin or something alike.</p>
  
  <p>Any help?</p>
  
  <p>Thanks in advance!</p>