I am a novice. I would like to join two separate mp3 files to make one mp3 file.?

Open up both files in Notepad and then open another window of Notepad. Go into File A and look towards the end for a "TAG". Select the TAG and everything after it and delete it. Now copy what's left of File A and paste it into the new file. Exit File A WITHOUT SAVING. Next copy all of File B and paste it into the new file. Save the new file as Join.mp3 or whatever. Exit all windows of Notepad and fire up your media player, you're all set!