Use aggergate category.

It will be used to relate with Computer.

master/bt5/vifib_slapos_core/PortalTypeBaseCategoryTemplateItem/base_category_list.xml

@@ -6,6 +6,9 @@
   <item>aggregate</item>
   <item>specialise</item>
  </portal_type>
+ <portal_type id="Software Installation">
+  <item>aggregate</item>
+ </portal_type>
  <portal_type id="Software Installation Module">
   <item>business_application</item>
  </portal_type>

master/bt5/vifib_slapos_core/bt/revision

-43
\ No newline at end of file
+44
\ No newline at end of file

master/bt5/vifib_slapos_core/bt/template_portal_type_base_category_list

@@ -2,6 +2,7 @@ Hosting Subscription Module | business_application
 Slave Instance | aggregate
 Slave Instance | specialise
 Software Installation Module | business_application
+Software Installation | aggregate
 Software Instance Module | business_application
 Software Instance | aggregate
 Software Instance | specialise
\ No newline at end of file