How can I merge two or more PGN files into one PGN file?

I have several games in different PGN files and I want them published as a single PGN file. This is how to create it: Open one PGN in a text editor and copy all information to the clipboard. Open the other PGN in a second text editor and paste the clipboard at the beginning or end of this second file. Close and save the file with a new name and with the extension .PGN. Now you have combined both PGN files into one PGN file.