Introduction to Pgn Files by Grand Master Nigel Davies
After a Game or like this example an Opening. Mark it and Copy (Ctrl+c)
Insert (Ctrl+v) in NotePad
The trick is to save the file with the extension .pgn. Call it whatever you like but it must be saved as .pgn
Find the file or another Pgn file on your computer and Open in your Favorite Chess Program
In Shredder Chess you can just mark and copy the notation (FEN&PGN) from the Chess Analysis Program and insert it directly into Shredder with Ctrl+v.