README.md in closure_tree-4.2.7 vs README.md in closure_tree-4.2.8

@@ -57,11 +57,14 @@
 
 1.  Add this to your Gemfile: ```gem 'closure_tree'```
 
 2.  Run ```bundle install```
 
-3.  Add ```acts_as_tree``` to your hierarchical model(s). There are a number of [options](#available-options) you can pass in, too.
+3.  Add ```acts_as_tree``` to your hierarchical model(s).
+    Make sure you add ```acts_as_tree``` *after any ```attr_accessible``` and ```self.table_name =```
+    lines in your model.
+    Please review the [available options](#available-options) you can provide.
 
 4.  Add a migration to add a ```parent_id``` column to the model you want to act_as_tree.
     You may want to also [add a column for deterministic ordering of children](#sort_order), but that's optional.
 
     ```ruby
@@ -91,10 +94,10 @@
         # For "all progeny of…" and leaf selects:
         add_index :tag_hierarchies, [:ancestor_id, :descendant_id, :generations],
           :unique => true, :name => "tag_anc_desc_udx"
 
         # For "all ancestors of…" selects,
-        add_index :tag_hierarchies, [:descendant_id]
+        add_index :tag_hierarchies, [:descendant_id],
           :name => "tag_desc_idx"
       end
     end
     ```