Thanks. I basically took the example code, stuffed it into the script specified under my level's Map Properties in WED, and removed references to images:

Code:

---

WINDOW WINSTART
{
  TITLE "This is a test.";
 	SIZE 480,320;
 	MODE IMAGE;
 	BG_COLOR RGB(240,240,240);
 	FRAME FTYP1,0,0,480,320;
  BUTTON BUTTON_START,SYS_DEFAULT,"Start",400,288,72,24;
  BUTTON BUTTON_QUIT,SYS_DEFAULT,"Abort",400,288,72,24;
  TEXT "This is also a test", 0, 0;
}

---

I'm actually not even sure if this is where said code should be placed.