+First, copy your preference data over to the new directory. Usually
+this is ok, but if you are upgrading from anything less than 1.0.5, we
+strongly suggest you let your users reset their preferences. There
+were important security upgrades in 1.0.5 regarding preference files.
+
+ $ cp squirrelmail-1.0.6.bak/data/* squirrelmail-1.2.0/data
+
+B. Config details
+
+If at all possible, start the configuration process from scratch. It is
+much less prone to missing configuration options than copying your old
+configuration. Ideally, you should just run conf.pl to reconfigure
+SquirrelMail. If you decide to copy your old config.php over, we strongly
+recommend that you run conf.pl to make sure things are correct and then save
+the config file.