diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# PluginSorter
+# Plugin Sorter
 
 PluginSorter is a Custom Manager Page allowing you to define the execution order of your plugins, per event.
 
@@ -7,6 +7,27 @@ PluginSorter is a Custom Manager Page allowing you to define the execution order
 * PHP >= 5.3
 * MODX Revolution 2.2+
 
+## Installation & notes
+
+Install from the Package Manager.
+
+During setup, you will be offered to :
+
+### Automatically sort existing events
+
+This is a required action to make Plugin Sorter work.You can skip it during the setup and perform this action from the CMP later on.
+What it does is assign & increments a `priority` value to each `modPluginEvent` object.
+
+In the CMP, you will find a button which allows you to perform this action at will (most likely after each plugin creation/creation since MODX creates all plugins with a priority of `0`, messing up the whole priority role).
+If you click the button when "All events" if set in the near combo box, the sorting will be done for all system events. If you filter to a particular system event, the sorting will only be done for that event.
+
+### Automatically refresh cache
+
+When manipulating the modPlugin objects (and related), MODX needs to refresh its cache to "activate" the changes.
+Activate this option to do it automatically after each action that requires it.
+
+If you know what you are doing, you can safely skip it, and manully clear the cache when you are satisfied with your configuration.
+
 ## License
 
 PluginSorter is lisenced under the MIT lisence.