How to join .001, .002,...-files in Windows

Join with HJSplit:

- download HJSplit [hidden link - please register] or [hidden link - please register], (~190kb).
- make sure all parts of the video are in the same folder
- open hjsplit, click the join button, select the .001 file, click start...takes only a few seconds and you´re done.
[hidden link - please register]

Join with 7-Zip

- download 7-Zip [hidden link - please register] or [hidden link - please register] (~1mb) and install it
- make sure all parts of the video are in the same folder
- open 7-Zip and go to the folder that contains the parts
- highlight the .001 file and push the extract button, choose folder...done.
You can use 7-Zip to extract different formats like .rar, .zip...etc, it is a very useful tool.
[hidden link - please register]

If you use JDownloader, it should extract automatically.