Added paragraph about local verbs

README.md

@@ -24,6 +24,8 @@ The order is not important and the arguments are not passed on to the game.
 
 The easiest way to implement a new fix or modify an existing one, is to use local fixes.
 
+### Game fixes
+
 First of all, you should find the Steam-ID of the game (right click the game in your Steam library -> 'Properties...' -> 'Updates' -> 'App ID:') and use it as the filename, with a `.py` extension.
 
 Example `Day of Defeat: Source` (AppID 300):
@@ -38,6 +40,20 @@ Note that local fixes override the included "global" fixes. So using an existing
 
 For example, overriding the default fix will disable [the parameter parsing for Steam games](#start-parameter-fixes). This can be restored by copying [the global default file](gamefixes-steam/default.py) and applying your changes accordingly.
 
+### Verbs
+
+You can also add local Winetricks verbs, just like the ones implemented [here](verbs).
+
+This also allows you to override existing Protontricks and Winetricks verbs, for example if a URL or file hash has changed.
+
+> ~/.config/protonfixes/localfixes/<verb_name>.verb
+
+To call them, just use the default function:
+
+```python
+util.protontricks('<verb_name>')
+```
+
 ## Non-Steam games
 
 As we support platforms other than Steam, these fixes can also be used by other launchers, such as Lutris, Heroic, Legendary or Bottles.