'sigh* Where's Kravvitz' sig when you need it? Go
here and read tutorials, and use the search function to find answers to problems you might run into. You also mentioned YR Arg - they've got a tutorials-section, too.
In other words: Everything you need to know has been written down. Read it, and the mod will be no problem for you.
Oh, and btw: Not every voxel on YR Arg comes with rules. Just so you know.