Put command:
.railstart 3;0;0;1
then
.rail 3;10
.........
then when you want to end the crossover, put command:
.railend 3
EXAMPLE: (Som
parts are extracted from the CCL)
0,
.wall 0;0;3,
.wall 1;0;4,
.railstart 3;0;0;1
.railstart 4;20;0;1
.rail 4;20
.rail 3;0
25,
.wall 0;0;3,
.wall 1;0;4,
.rail 4;11
.rail 3;2
.announce ccl xt_CC2.wav
50
.wall 0;0;3
.wall 1;0;4
.rail 4;2
.rail 3;11
..........
Oh chay, I thought how, so simple, thanks Bryan! 
Anyway, can I see your progress update Wanmah? I'm very
interested to see screenshots.