Ok, the Loderunner.tap file seems to work. Unfortunately, this is the only file which I found for this system.
1.) Choose language > English (Tab menu/DIP Switches)
2.) Mount the Loderunner.tap (not the SPC-1000 version) file
3.) Select R to load/start the SPC-1500 SAMSUNG BASIC ROM
4.) Type: LOAD
5.) Push Play (Tape Control)