Satmaps Xpedition online planning software is free to use and a great tool for 

planning your routes with to then send to your GPS device using SatSync.

You need to have Microsoft Silverlight plug-in application on your computer for Xpedition to run,
Google Chrome does not support this application, the recommended browsers to use when accessing Xpedition are as follows:

If using a Windows Computer: Mozilla Firefox v11 and above

If using a Mac Computer: Safari v4 and above

The latest Silverlight Plug-in can be downloaded from here

(If you are using a Mac OS 10.5.7 (Leopard) or above is required for Silverlight to be compatible)

Mozilla Firefox Browser can be downloaded from here