The problem you are probably having is with the real cart you are trying to use. A real cart is needed for the N64 to verify the security chip in it. See this link for the answers to all (most?) of your questions: http://n64.icequake.net/mirror/www.elitend...ave_faq.html#s8
The V64 is worth it, but it does require a little bit of work.
The V64 is worth it, but it does require a little bit of work.