Best way to start is to go through the tutorials hosted on this forum, and check out one about adding a unit on cnc universe. Start out small and simple with something really easy to do and work your way up. Read the sticky posts at the top of this forum, they're important as well. Just play around with the ini's and see what you can do, worst case scenario that dreaded error window pops up, generals doesn't start and you try to figure out where you messed up
