diff --git a/templates/preseed.cfg.j2 b/templates/preseed.cfg.j2
index 2938b45..277ee8a 100644
--- a/templates/preseed.cfg.j2
+++ b/templates/preseed.cfg.j2
@@ -370,10 +370,12 @@ d-i apt-setup/disable-cdrom-entries boolean true
 # apt will complain about the unauthenticated repository and so the
 # sources.list line will be left commented out.
 #d-i apt-setup/local0/key string http://local.server/key
-# If the provided key file ends in ".asc" the key file needs to be an
-# ASCII-armoured PGP key, if it ends in ".gpg" it needs to use the
-# "GPG key public keyring" format, the "keybox database" format is
-# currently not supported.
+# or one can provide it in-line by base64 encoding the contents of the
+# key file (with `base64 -w0`) and specifying it thus:
+#d-i apt-setup/local0/key string base64://LS0tLS1CRUdJTiBQR1AgUFVCTElDIEtFWSBCTE9DSy0tLS0tCi4uLgo=
+# The content of the key file is checked to see if it appears to be ASCII-armoured.
+# If so it will be saved with an ".asc" extension, otherwise it gets a '.gpg' extension.
+# "keybox database" format is currently not supported. (see generators/60local in apt-setup's source)
 
 # By default the installer requires that repositories be authenticated
 # using a known gpg key. This setting can be used to disable that
@@ -401,7 +403,7 @@ d-i pkgsel/upgrade select full-upgrade
 # You can choose, if your system will report back on what software you have
 # installed, and what software you use. The default is not to report back,
 # but sending reports helps the project determine what software is most
-# popular and should be included on the first CD/DVD.
+# popular and should be included on the first DVD.
 popularity-contest popularity-contest/participate boolean false
 
 ### Boot loader installation
@@ -450,7 +452,7 @@ d-i grub-installer/bootdev  string {{ debianunattended_partman_auto_disk | defau
 # Avoid that last message about the install being complete.
 d-i finish-install/reboot_in_progress note
 
-# This will prevent the installer from ejecting the CD during the reboot,
+# This will prevent the installer from ejecting the disc during the reboot,
 # which is useful in some situations.
 #d-i cdrom-detect/eject boolean false