title: Adding product type in prestashop add product page
body: <p>Iam new to prestashop ,iam trying to add new product type in addition to  Standard product,Virtual product ,Pack of existing products</p>
  
  <p>Added this in informations.tpl file</p>
  
  <pre><code>&lt;
  div class="radio"&gt;
                  &lt;label for="digital_product"&gt;
                      &lt;input type="radio" name="type_product" id="digital_product" {if $is_in_pack}disabled="disabled"{/if} value="{Product::PTYPE_DIGITAL}" {if $product_type == Product::PTYPE_DIGITAL}checked="checked"{/if} &gt;
                      {l s='Digital product (services, booking, downloadable products, etc.)'}&lt;/label&gt;
              &lt;/div&gt;
  </code></pre>
  
  <p>i want to save this in new column is_digital in ps_product table.iam struck here.Please help. Is there any any documentaion for full  working flow of  all classes and functions of prestashop?</p>