ok,

as nobody seems to be willing to answer you, i will try it.

You have to open the dgdata data file in your demigod folder with for expample winzip. Then you have to open the "map" folder an choose map 12.

You can change all the things appearing on the map in the MAP12_save.lua file.

I would suggest to make a copy of the file before. Also, make different copys of your work, while you are creating your mod and test the single steps you make, one wrong sign in the code won't let the map start.

Then, you have to get into the coordinate system of the map. For that, i would suggest to make a screenshot of the map and insert the coordinates of all flags/important buildings of the map, so that you can see what variable changes what.

The script itself seems completely unordered for me, so i would suggest to use the search function to find the differnt things you want to change.

I personally just created parts of the design of the cataract new mod and the leviathan new mod, so i really don't have any plan, how to define the waypoints for the creeps, how to bond portals to flags and so on, but it did not seem so complicated to me at all. 

Just to get you through this, i would suggest to compare for example the files of our cataract mod and the original file.

I think I also will ask udo (he did the code), if he can help you with exact answers. If I remember everything correctly, it took him almost three days to get the code in his mind and do the code for our first map.

I hope I could help you so far.