Here is the Link to perform this, please leave your comments here thank you… http://www.marccizravi.com/2010/remove-wd-smartware/
This does not remove the hidden partition permamently, just hides it. It is hidden on a UDF partition (some call it a rootkit but that is debatable) and when you format or partition, it does not touch the UDF side. If you run some disk management tools, it will still show the UDF hidden partition.
You can format and repartition to your heats content but it will be there. Everyone has tried that link and many others like the u3tool, HP’s Low Level Format that worked removing this bloatware from Scandisk USB hard drives etc.