For fullscreen.
options/screen
Check "strech screen" "full size" and perhaps "fixed fullscreen resolution". Press alt+Enter to go in Fullscreen mode and just exit, the next time, you will be in fullscreenmode.
But use fullscreen only when all is ok, windowed mode is better for test.
With this script, normaly you have nothing to do, it will search itself the dtlite path, and SSF find the Drive letter itself (from my memory).
If the script don't found DTLite, it display an error message and don't launch SSF. So I think this part is ok.
Have you configured dtlite ? create a new virtual drive DT.
To make a try, during the emulation, return to window and lanch dtlite, if all is ok you will see your rom loaded in the bottom window.
Remember to use always the CUE file.
Or make a try in stand alone mode, mount your rom in Dtlite and launch SFF.
In SSF in options/peripheral/Cd drive, I have DTsoft BDrom, I don't remeber if it s usefull.
I think it because you have used SCSI mode and me DT in DTlite configuration, it s not the same command line for the 2 mode.
On this screen.
1 arrow to create virtual drive (only 1 time is enought)
1 arrow to mount the selected image.
1 arrow for the resultat.
Sorry I m really bad to draw ^^.