Take the following steps:
1. place all three zipfiles in a directory
2. unzip them (you'll get files with extension .0, .1 and .2 and the hacha application
3. start the hacha application (this version is in english instead of spanish)
4. click "Join"
5. select the file stern-jesse.wmv.0 and press open
6. click "Join Files", and your clip is generated!