I have putting all my setups in a Custom List. You press the Songbook button, then select Custom List Edit, create a new list and name it whatever you like.
Then you set the entire keyboard like you want for a certain song. Then select Book Edit 1, press Write and name your entry before saving. At this time you can set up and add new STS settings to your song. You can save other parameters by going to Book Edit 2 and 3.
Then go to the main list and press Add To List. Before shutting the keyboard off, go to Custom List edit and SAVE your Custom List!
It's easier than it sounds, and after you do it a few times it becomes second nature.
Also, be certain to Back Up your Songbook occasionally, just in case!
Hope this helps you get started.
DonM