diff --git a/Run.sh b/Run.sh
index 0aacc75..78deb35 100755
--- a/Run.sh
+++ b/Run.sh
@@ -3,6 +3,8 @@ SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 OUTPUT_DIR="$2"
 CFG_FILE="$3"
 DEFAULT_CFG_FILE=NIUT.ini
+DEFAULT_INSTALL_CFG_FILE=UnrealTournament.ini
+
 function add_iniKeyEx() {
 	crudini --set $OUTPUT_DIR/System/$1 $2 __$3 $4
 	# Warning: ugly hack with sed to allow multiple key instances + to remove space around '='
@@ -131,6 +133,21 @@ function check_cfg_file_gen() {
 		exit 9999 # die with error code 9999
 	fi
 }
+function check_cfg_file_gen2() {
+	if [ -z ${CFG_FILE} ]
+	then
+		echo "CFG_FILE is unset, setting it to $DEFAULT_INSTALL_CFG_FILE"
+		CFG_FILE=$DEFAULT_INSTALL_CFG_FILE
+	else
+		echo "CFG_FILE is set to '$CFG_FILE'"
+	fi
+	if [ ! -f $OUTPUT_DIR/System/$CFG_FILE ]
+	then
+		echo "$OUTPUT_DIR/System/$CFG_FILE does not exist"
+		show_help
+		exit 9999 # die with error code 9999
+	fi
+}
 function check_game_dir() {
 	### Check if a directory does not exist ###
 	if [ -z $OUTPUT_DIR ]
@@ -151,7 +168,7 @@ case "$1" in
 			;;
 	'enable')
 			check_game_dir "$@"
-			check_cfg_file_gen "$@"
+			check_cfg_file_gen2 "$@"
 			disable "$@"
 			enable "$@"
 			;;
@@ -162,7 +179,7 @@ case "$1" in
 			;;
 	'disable')
 			check_game_dir "$@"
-			check_cfg_file_gen "$@"
+			check_cfg_file_gen2 "$@"
 			disable "$@"
 			;;
 	*)