Vikram,
Please read the JavaRanch policy on user names at
http://www.javaranch.com/name.jsp, and register a user identity with a complete first and last name.
I'm working on an answer to your questions about stubs on the server and how unmarshaling works without a skeleton; now that I'm at that point in my Developer project I feel like I ought to know too. In the meantime, any RMI internals expert please feel free to help us out here!
Jerry