hlcsg.exe-wadinclude 123 "% mapname%"
If we have several WAD-files, for example: 123.wad, 456.wad and 789.wad, we must for every WAD-file option to write-wadinclude, ie, Prompt start HLCSG should look like this:
hlcsg.exe-wadinclude 123-wadinclude 456-wadinclude 789 "% mapname%"...