diff --git a/README.md b/README.md
index 6cef6be..9ffa830 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,19 @@
 # HOWTO
 
+1. Modify **ils** directory (adds CSS, removes CSS, modifies CSS, etc.)
+2. Launch this command:
+
 ```
-make clean
-make
+make clean && make
 ```
 
-generates:
+It will generates:
 
   * static.tar.gz: files for all rero-ils instances
-  * static.tar.gz: files for rero-ils **pilot** instance (with a specific logo-global.png file)
+  * static-pilot.tar.gz: files for rero-ils **pilot** instance (with a specific logo-global.png file)
+
+Each **.tar.gz** file will contains:
+  * *css* directory with all CSS files
+  * *images* directory with pictures (for static-pilot.tar.gz, the **logo-global.png** is those from **logo-global.pilot.png in current directory**)
+
+Note: The script will transform each **resources.rero.ch** URL by another one. `resources.rero.ch/ils/test` for *static.tar.gz* file and `resources.rero.ch/ils/pilot` for *static-pilot.tar.gz* one.