+The PlanetLab builds has the concept of a 'distribution' that allows
+advanced user to customize the contents of the build. If you're not
+an advanced user, please just use the regular 'planetlab'
+distribution.
+
+If you want to take advantage of a custom distribution, see
+README-pldistros.txt for further details. Please feel free to contact
+devel@planet-lab.org, as all this is not precisely foolproof :)
+
+=====