+files. Said another way, we recommend using <code>rpm -ivh</code>.</p>
+
+<p>If you have an existing 2.x tree which you want to keep unchanged, then
+you will need to move it to make space for the new one. For example, if you
+have an existing tree in <tt>/opt/tinyos-2.x/</tt>, then you can move it
+to <tt>/opt/tinyos-2.x-old</tt>. Once you have moved it, we recommend
+performing a forced installation of the 2.0 tree.</p>
+
+<p>If you have an existing 2.x tree which you do not care about, then we
+recommend removing it before installing the new one with a forced install.</p>