I need an alternitve to MultiVerse/MyWorlds

My friends and I have a private server and want to play skyblock. The plugins I have seen don't work so What I figured is I could just put the map into the server as another world and use MultiVerse or MyWorlds to go to it. But Multiverse is for Craftbukkit 1.2.5R1.0 and MyWorlds is for Craftbukkit 1.2.5R3.0. Now, I'm new to servers but if I'm not mistaken, a plugin for Craftbukkit 1.2.5R3.0 won't work for Craftbukkit 1.2.5R4.0 right? If so, what is a plugin that does what Multiverse does that works on Craftbukkit 1.2.5R4.0?