Here are the steps to get this working in addition to the above mentioned article:
-you should make a boot camp partition (using boot camp assistant) first rather than an individual partition.
-unfortunately, depending on how your drive is written, I notice that boot camp assistant doesn’t allow you to partition in certain amounts (example: I could not set my partition to 150Gb … only 151 or 149). Previously I was using 149Gb, which caused it not to work even after following the instructions in your article.
-therefore, ensure the partition is at least larger than the previous (source) boot camp partition. In my case my old boot camp was exactly 150gb so I had to make the new boot camp partition 151gb).
-now follow the steps in the article