README.md in middleman-presentation-0.15.5 vs README.md in middleman-presentation-0.15.6

@@ -484,12 +484,15 @@
 
 <a name="custom_templates"></a>
 
 Addiontionlly users can define one `custom`-slide-template. It's file extension
 is used for the resulting slide. Given a template `custom.erb.tt` it becomes
-`01.html.erb` when running `middleman slide 01`.
+`01.html.erb` when running `middleman slide 01`. 
 
+You may need to add the
+template parser-gem to your `Gemfile` and require it in your `config.rb`.
+
 **Example**
 
 Given you want to create a presentation local custom slide template with haml
 as template language. The created slides should automatically get `.haml` as
 file extension. First you need to create the template directory.
@@ -508,20 +511,24 @@
 system.
 
 *templates/custom.haml.tt*:
 
 ```
-%h1 <%%= site_title %>
-%h2 <%%= title %>
+%section
+  %h1 Site Title
+  %h2 <%%= title %>
 ```
 
 After writing the file to the filesystem you can use it with the
 `slide`-command to create slide by running the following code.
 
 ```bash
 # => creates source/slides/01.html.haml
 bundle exec middleman slide 01
 ```
+
+If you have more than one "custom"-template the first is one used. The order is
+based on file name.
 
 ### Predefined slide templates
 
 There are four predefined slide templates available: