This is the code I'm using...
Font is in path, and installed on the windows machine.
local l = fe.add_text("[Title]", 5, 12, 550, 35 );
l.set_rgb( 255, 255, 255 );
l.font="Digital-7 Italic";
l.align = Align.Left;
l.style = Style.Bold;
l.charsize = 28;