Get Project 64K (K for Kaillera) http://pj64k.emulation64.com This is project 64 with online playing capabilities via connecting to servers, but for LAN I suggest you google the Kaillera Server Pack and set one up for your LAN, access this server on Kaillera via both computers and initiate the game. Google for more in depth stuff if needed, pretty straight forward apart from setting up a little server part. Edit-- Here's a link to the server pack you need http://www.kaillera.com/files/kaillerasrv-0.86-win32.zip it may contain instructions inside too.
how do i work this thing cause ive tryed about a doxen diffeerent ways could you mabe write a step by step for me please