Describe how to load a new database

Tools/pynche/README

@@ -344,6 +344,13 @@ Color Name Database Files
     sister say NS and MSIE both understand (with some controversy over 
     AliceBlue).
 
+    You can switch between files by choosing "Load palette..." from
+    the "File" menu.  This brings up a standard Tk file dialog.
+    Choose the file you want and then click "Ok".  If Pynche
+    understands the format in this file, it will load the database and 
+    update the appropriate windows.  If not, it will bring up an error 
+    dialog.
+
 To Do
 
     Here's a brief list of things I want to do: