New sound banks are available on this Web site on our User and OS Update pages and are free to download.
This is actually very similar to upgrading the OS in your Nova.
1 - Connect the MIDI out of the sequencer to the MIDI in of the Nova.
2 - Turn the Memory Protect OFF ( in page 6 of the Global mode ) & make sure your Nova is set to global channel 1. ( page one of the Global mode )
3 - Load the Total.mid file into your sequencer.
4 - Play the sequencer. ( The display will show the status of incoming messages )

If you experience problems with this file, it is probably due to similar problems that can occur when updating the OS. Please refer to page 91of the Owners Manual.