setloadingtimes / setgametime

Hello, I can't find a documentation nor solution (after studying your source code), to set these both times. Neither the "TIME" format is documented anywhere, nor it did work with "mm:ss", "hh:mm:ss" nor milliseconds. 
A second thing I don't get is the "S" in "setloadingtimeS", can I provide several times for each split? This would be what I am looking for, ty for hints.