diff --git a/backup_sites_mysql/backup_sites_mysql.sh b/backup_sites_mysql/backup_sites_mysql.sh
index 7c09fac..5f2bc81 100755
--- a/backup_sites_mysql/backup_sites_mysql.sh
+++ b/backup_sites_mysql/backup_sites_mysql.sh
@@ -1,5 +1,13 @@
 #!/bin/sh
 #
+# backup_sites_mysql.sh, Copyright © 2006-2010 Matteo Cypriani
+#
+# This program is free software. It comes without any warranty, to
+# the extent permitted by applicable law. You can redistribute it
+# and/or modify it under the terms of the Do What The Fuck You Want
+# To Public License, Version 2, as published by Sam Hocevar. See
+# http://sam.zoy.org/wtfpl/COPYING for more details.
+
 ###############################
 ##### Options utilisateur #####
 
diff --git a/lz/README b/lz/README
index 76f6ae8..da63d92 100644
--- a/lz/README
+++ b/lz/README
@@ -1,10 +1,13 @@
-The lz script emulates and extends the lz and uz commands of the mtools.
+The lz script emulates and extends commands lz and uz from the mtools.
 
-It handles: .tar, .tar.gz, .tar.bz2, .tar.xz and .tar.lzma, through the
-standards options of GNU tar.
+It handles: tar, tar.gz, tar.bz2, tar.xz, tar.lzma and tar.Z (and
+associated 3-characters extensions: tgz, tbz, tb2, tlz, txz, taz)
+through the standards options of GNU Tar.
+Note that you need GNU Tar, at least version 1.20 to support LZMA
+compressed archives, and version 1.22 for XZ compressed ones.
 
-If the script name is "lz", the archive content is displayed. If the name
-is "uz", it is extracted.
+If the script name is "lz", the archive content is displayed. If the
+name is "uz", it is extracted.
 
 To install lz and uz, move put script in a directory in the PATH (for
 instance /usr/local/bin) and hard link it to uz:
diff --git a/lz/lz b/lz/lz
index 058dc84..754c419 100755
--- a/lz/lz
+++ b/lz/lz
@@ -8,12 +8,13 @@
 # To Public License, Version 2, as published by Sam Hocevar. See
 # http://sam.zoy.org/wtfpl/COPYING for more details.
 #
-# This script emulates and extends the lz and uz commands of the mtools.
+# This script emulates and extends commands lz and uz from the mtools.
 # It handles: .tar, .tar.gz, .tar.bz2, .tar.xz, .tar.lzma and .tar.Z,
 # through the standards options of GNU tar.
 # If the script name is "lz", the archive content is displayed. If the
 # name is "uz", it is extracted.
-# Note that you need GNU Tar, at least version 1.22 to support XZ files.
+# Note that you need GNU Tar, at least version 1.20 to support LZMA,
+# and 1.22 to support XZ.
 
 
 ## Verify program name ##
diff --git a/metaflac-field2field/metaflac-field2field.sh b/metaflac-field2field/metaflac-field2field.sh
index 4445d42..6c488e3 100755
--- a/metaflac-field2field/metaflac-field2field.sh
+++ b/metaflac-field2field/metaflac-field2field.sh
@@ -1,5 +1,19 @@
 #!/bin/sh
-# Utilise metaflac pour effectuer des actions de copie ou déplacement de champ à champ sur les fichiers FLAC.
+#
+# metaflac-field2field.sh, Copyright © 2009 Matteo Cypriani
+#
+# This program is free software. It comes without any warranty, to
+# the extent permitted by applicable law. You can redistribute it
+# and/or modify it under the terms of the Do What The Fuck You Want
+# To Public License, Version 2, as published by Sam Hocevar. See
+# http://sam.zoy.org/wtfpl/COPYING for more details.
+#
+# This script uses metaflac to process field to field copy/move on
+# FLAC file metadatas.
+# Launch this script without arguments to display usage.
+# ----
+# Ce script utilise metaflac pour effectuer des actions de copie ou
+# déplacement de champ à champ sur les fichiers FLAC.
 # Lancer ce script sans argument pour afficher son utilisation.
 
 print_usage()