When I extract the zip I downloaded, then I get for three files the error that path is too long.
Did you ever try to extract the files on a windows PC?
Now I should know where exactly in your zipfiles are these 3 files, so I can copy them manually.
2 files start with commerce_product_referenced_handler...
1 file starts with EntityReferenceInstanceBehaviourExample
We have extracted the zip file succesfully. Please see this link http://www.youtube.com/watch?v=60aQwGvC5Bs to solve this error. If you still have any error, we will send file to you