1. Start BSplayer
2. Open the Playlist
3. Add the file(s) you want for your shortcut
4. In the Playlist window select the first file and check the "Full screen" box
5. Still in Playlist set for each file the Aspect and Pan-Scan option (you can select for the first file and leave As previous for the others)
6. Save your playlist as internal format with the name you want
optional...
7. In BSplayer's settings window, general settings, check the box "Shutdown computer when finished"
For me works this way!