diff --git a/packages/maps/official/official_readme.txt b/packages/maps/official/official_readme.txt
index 5f98f6bf..2b318156 100644
--- a/packages/maps/official/official_readme.txt
+++ b/packages/maps/official/official_readme.txt
@@ -1,3 +1,16 @@
+To ensure you have no errors with AssaultCube.
 Do not edit, rename or delete maps in this directory.
 Do not add files to this directory.
 
+
+Note for folder:
+================
+Handy linux command for keeping *.cfg sizes small:
+	gawk '{sub(/\r$/,"")};1' INPUT_FILE | gawk -F'//' '{print $1}' | gawk '{sub(/[ \t]+$/, "")};1' | gawk NF > OUTPUT_FILE
+
+* Converts all new-lines to UNIX format (instead of DOS format).
+* Removes all comments in the file.
+* Removes all trailing spaces/tabs.
+* Removes all blank lines.
+
+Remember to replace the words INPUT_FILE and OUTPUT_FILE in this script with the file.
\ No newline at end of file