Installing Nether Portals - Multiverse/Multiverse-NetherPortals GitHub Wiki
Multiverse-NetherPortals is very easy to install.
Step 1: Make sure you have at least CraftBukkit Recommended Build(RB)
Grab latest version [here] (http://dl.bukkit.org/).
Step 2: Make sure you have the very latest Multiverse-Core Awesome Build(AB)
Grab latest version from here. Put it in your plugins folder.
If you need help installing Multiverse-Core, here's a short how-to.
Step 3: Download Multiverse-NetherPortals Awesome Build(AB)
Grab latest version from here. Put it in your plugins folder.
Step 4: Start your server.
Go.