[ns] New Node configuration

["ns user" <ns_user@hotmail.com>]

Hi,
   I am trying to add a new node configuration using ns. For example I am 
trying to add a functionality of node which is similar to mobile node but 
does little differnt than a mobile node does. How do I do this apart from 
adding a cc and h file ... Do I need to modify the command portion of ns? 
What else do I need more...
TIA,
ns_user

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