For those of you who have had trouble installing the Norfolk Southern Megapack, following is the procedure:
#1: Run the main auto installer that comes in the .zip file. #2: In your Start Menu > Programs, there will be a listing for KLW TrainSim > NS Megapack Manual. Click the manual. #3: The manual main page will include a button marked "INSTALLATION" on the top left corner. Click this, then the following install file. The main package will now install.
Please realize that this addon was made previous to my better knowledge as to the creation of auto-installers. Somewhere in the NS Megapack directory in Program Files/KLW TrainSim is the actual INSTALL.exe, if you wish to keep it. If you know what is good for you, delete the entire manual, for it is of little use. Don't know why I bothered to make one.