Using this software you can easily combine at least two mpg/mpeg video files having the same characteristics into one single output.
To initiate a joining session is very simple using CombiMovie. Just select the folder containing the videos you want to combine and the application will automatically add them into the FileList, all selected by default.
You can rearrange and preview them before joining and also change the default name of your output file (the destination is same with source location).
If you are interested only in combining multiple MPGs into a single video file, CombiMovie is a free and reliable solution.