Just wondering if there is an easy way to add column borders for the grid?  I am using the default skin. (I don't want to use another skin, just add css styles for the existing skin or modify it.)  Also,  How exactly would I modify the default skin?  I already looked at all the help on this, and it said to modify the skin, but since it is embedded, where exactly do I download it from?  I don't understand how I can just modify it if it is in the dll.  
Thank you.
                                Thank you.