The solution is for now in alpha stage, some manual calculations and painful to add, but I'm sure we will figure something out.
For an example of what I post a pic of the start trigger in oasis path "Allies 1st to wall":
![Image](http://s20.postimage.org/s34f9n5t5/2013_03_14_123538_oasis.jpg)
![Image](http://s20.postimage.org/m3go5zl0p/2013_03_14_124750_oasis.jpg)
ps: the black thing is the trigger
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)