its fairly easy to use, but here goes: In the first box down the bottom, where it says "Type", select TCP. Then in the next box, type "25565". Then put any name you want in the last box, for example Minecraft, or Craftbukkit. Then click add, and start up your server. GO to http://canyouseeme.org to see if the port is open. If not, make sure java can go through the firewall no, just rename the downloaded file to craftbukkit.jar and it will work with the run.bat that came with the installer. Or, I recommend downloading and using the newest installer. It fixes these issues. EDIT by Moderator: merged posts, please use the edit button instead of double posting.