Mpeg Video Joiner joins .mpg or .mpeg files that were split before (so only files with the same frame rate and frame size can be successfully joined). You can also add files using drag & drop feature. An internal player lets you preview the files or play the joined file after the operation is done. To make it even easier, it creates a new output file automatically and it can delete (recycle bin) the files after joining.
MPEG Video Joiner