title: magmi with multiple csv and category with references
body: <p>I need to automatically update the products from one vendor to magento.
  I am using magmi.</p>
  
  <p>This provider makes me 3 .csv: products, categories and images</p>
  
  <p>How I can do to automatically upgrade these products?</p>
  
  <p>In addition I have another problem with the categories .csv, I copy an example:</p>
  
  <p>categories.csv</p>
  
  <pre><code>ID_CATEGORY      |   CATEGORY_NAME        | CATEGORY_FATHER_ID
  4                |     JARDINERIA         |        0
  100              |  Mobiliario jardin     |        4
  1085             | Conjuntos de jardin    |       100
  102              | Conjuntos de jardin    |       100    
  109              | Mobiliario de jardin   |       100
  110              |  Polyrattan Marron     |       109
  112              |  Polyrattan Marfil     |       109
  </code></pre>
  
  <p>product.csv</p>
  
  <pre><code>SKU      | NAME            | CAT  | Shot_description | DESCRIPTION                 | PRICE    | STOCK | img_number
  01010080 | BLISTER ALAMBRE | 102  | Alambre          | Carrete alambre galvanizado | 1.230000 | 84    | 1
  </code></pre>
  
  <p>images.csv</p>
  
  <pre><code>SKU      | NUM_ORDER | URL
  08091264 | 1         | http://www.xxxxx.com/img_artics/08091264.jpg
  08091264 | 2         | http://www.xxxxx.com/img_artics/08091264_1.jpg
  08091333 | 1         | http://www.xxxxx.com/img_artics/08091333.jpg
  08091333 | 2         | http://www.xxxxx.com/img_artics/08091333_1.jpg
  08091333 | 3         | http://www.xxxxx.com/img_artics/08091333_2.jpg
  </code></pre>
  
  <p>How I can do it with magmi?</p>