What you would have to do is create a device or use the standard X10 file with the MX 500 and then teach the soft (LCD) buttons commands for 11 through 16. I am not sure about clone MX but most programs will allow you to import hex commands. You can do this by downloading pronto edit and then one of the IR files with 11 through 16. You then double click on these buttons which will allow you to get to the hex format. Again I am not sure of the particulars of clone program, but I gather hex codes for other remotes all the time using this method.

Bill
www.homeautomationet.com