The Civil2000 site has been directly licensed by the author of RCOGO to distribute it. Feel free to get a legal copy from the site and tell him that ChasMoone sent you.
Look up Double Meridian Distance (DMD) in old Surveying books. You'll find a great way of calculating enclosed irregular areas using the coordinates of the points. Takes a little imafiniation but is really expedited using computerized spreadsheets.
