if you mean you want your train to diverge, its .turn 0.16 or .turn -.16 and turn it back after 25 meters.
If you mean by creating switches like an X switch between rail 0, and rail 1 that is -4 away from the rail for example do something like:
100, (or whatever it was)
.railstart 2;0;0;4, /*/where your main rail is
.railstart 3;-4;0;4, /*/where your rail 1 is
*its like rails on top of one another or double tracks that you can't really see.
125, (25 meters after)
.rail 2;-4;0;4,
.rail 3;0;0;4,
.railend 2,
.railend 3,
that should make an X switch. If you were to run the route, your train would make the switching sound when it runs over it. Again, you could cover over these rails with free objects of your choice.
Other than that, I really don't know.