Update README.md

Author: EvenAR

README.md

@@ -1,3 +1,20 @@
 # ILS window plugin for EuroScope
 
-![image](https://github.com/user-attachments/assets/891e4868-6b48-4252-8923-440f4744961b)
+Inspired by the Norwegian Air Traffic Control System (NATCON).
+
+## Installation and use
+
+1. Download the latest release from the [Releases](here) page.
+2. Place the DLL and JSON file in the same directory.
+3. Load the plugin in EuroScope.
+
+By default the plugin will automatically open ILS windows based on the active arrival runways. It's also possible to open windows manually using `.par <title>` (where `<title>` refers to the `"title"` in the configuration file)
+
+## Configuration
+
+The plugin reads the JSON configuration file when the plugin is loaded. For detailed configuration options, refer to [the sample configuration file](/Sample%20config). Worth noticing:
+
+- `localizerCourse` must be the **true** heading in degrees
+- `maxOffsetLeft` and `maxOffsetRight` is used to specify the maximum visible range (in nautical miles) left and right of the localizer. Most relevant for airports with paralell approaches.
+
+![image](https://github.com/user-attachments/assets/49e513da-1fa5-4483-8823-f557a293c05a)