diff --git a/etc/xen-tools.conf b/etc/xen-tools.conf
index 9e66669..9d840b5 100644
--- a/etc/xen-tools.conf
+++ b/etc/xen-tools.conf
@@ -81,6 +81,16 @@ swap   = 128Mb    # Swap size
 fs     = ext3     # use EXT3 filesystems
 dist   = sarge    # Default distribution to install.
 
+#
+#  Currently supported and tested distributions include:
+#
+#   sid      = Debian
+#   sarge    = Debian
+#   etch     = Debian
+#   dapper   = Unbuntu
+#   centos4  = CentOS 4.
+#
+
 
 
 ##
@@ -123,12 +133,18 @@ kernel = /boot/vmlinuz-2.6.16-2-xen-686
 initrd = /boot/initrd.img-2.6.16-2-xen-686
 
 #
-# Default mirror for debootstrap
+# The default mirror for debootstrap which can be used to install
+# Debian Sid, Sarge, and Etch.
 #
 mirror = http://ftp.us.debian.org/debian/
 
+#
+# A mirror for use installing Ubuntus Dapper release:
+#
+# mirror = http://gb.archive.ubuntu.com/ubuntu/
+
+
 #
 #  Uncomment if you wish newly created images to boot automatically.
 #
-
 # boot = 1