-.Sarge-Release
-=====================================================================
-[1] Please notice that Sarge is the current old-stable within Debian.
-grml-debootstrap can handle the release but you really should not
-use Sarge anymore unless you really know what you are doing. Choose
-Etch or Lenny instead.
-=====================================================================
+.lenny release
+================================================================================
+[1] Please notice that lenny is an unsupported release within Debian nowadays.
+grml-debootstrap can handle the release but you really should not use lenny
+anymore unless you really know what you are doing. Choose Debian 6.0 (squeeze)
+or Debian 7.0 (wheezy) instead.
+
+Notice that you need to specify a mirror providing the lenny release, the
+default (http://http.debian.net/debian) doesn't provide it any longer nowadays.
+Set the mirror to e.g. http://archive.debian.org/debian/ if you don't have
+your own lenny mirror.
+
+When installing lenny to a new mdraid, grml-debootstrap will use md metadata
+format version 0.90. This limits the device to a maximum size of 2TB, but has
+the advantage of grub-legacy actually being able to boot from it.
+================================================================================
+
+[NOTE]
+.unstable and testing releases
+================================================================================
+[2] Please notice that jessie (Debian/testing) and sid (Debian/unstable) might
+not be always installable due to their nature. What _might_ work instead is
+deploying a stable release and upgrade it after installation finished.
+================================================================================