Updated with theme support

app/views/admin/shared/_vp_product_tab.html.erb

@@ -0,0 +1,5 @@
+<% if url_options_authenticate?(:controller => 'admin/taxons') %>
+ <li <%= ' class="active"' if current == "Volume Pricing" %>>
+   <%= link_to("Volume Pricing", volume_prices_admin_product_variant_url(@product, @product.master))  %>
+ </li>
+<% end %>

app/views/admin/variants/_edit_fields.html.erb

@@ -0,0 +1,17 @@
+<h3><%= t("volume_prices") %></h3>
+<table class="index">
+  <thead>
+    <tr>
+      <th><%= t("display") %></th>
+      <th><%= t("range") %></th>
+      <th><%= t("amount") %></th>
+      <th><%= t("position") %></th>
+      <th><%= t("action") %></th>
+    </tr>
+  </thead>
+  <tbody id="volume_prices">
+    <%= f.render_associated_form(@variant.volume_prices) %>
+  </tbody>
+</table>
+<%= f.add_associated_link(icon('add') + ' ' + t("add_volume_price"), @variant.volume_prices.build) %>
+<br/><br/>

app/views/admin/variants/volume_prices.html.erb

@@ -1,11 +1,11 @@
 <%= render :partial => 'admin/shared/product_sub_menu' %>
 
-<%= render :partial => 'admin/shared/product_tabs', :locals => {:current => "Volume Prices"} %>
+<%= render :partial => 'admin/shared/product_tabs', :locals => {:current => "Volume Pricing"} %>
 
 <%= error_messages_for :variant %>
 
 <% form_for(:variant, :url => admin_product_variant_url(@product, @variant), :html => { :method => :put }) do |f| %>
-  
+
   <h3><%= t("volume_prices") %></h3>
   <table class="index">
     <thead>
@@ -18,11 +18,11 @@
       </tr>
     </thead>
     <tbody id="volume_prices">
-  		<%= f.render_associated_form(@variant.volume_prices) %>
-  	</tbody>
+      <%= f.render_associated_form(@variant.volume_prices) %>
+    </tbody>
   </table>
   <%= f.add_associated_link(icon('add') + ' ' + t("add_volume_price"), @variant.volume_prices.build) %>
   <br/><br/>
-  
+
   <%= render :partial => 'admin/shared/edit_resource_links' %>
 <% end %>

volume_pricing_hooks.rb

@@ -0,0 +1,7 @@
+class VolumePricingHooks < Spree::ThemeSupport::HookListener
+
+  insert_after :admin_product_tabs, :partial => "admin/shared/vp_product_tab"
+
+  insert_after :admin_variant_edit_form, :partial => "admin/variants/edit_fields"
+
+end