Minecraft World Share (SinglePlayer only)

I found a place to where to download premade Minecraft worlds so that you don't have to start from scratch in a world in single player.

http://minecraft.bschaefer.net/

It's so cool. I downloaded the first world shown in the link above. It's like a mansion (zombies and creepers spawn in it because of the huge space) and you are given A LOT of items including diamond and obsidian and much more. I know it spoils the fun but I have plans to make my own settlement with supplies given already in this world.

I believe we can use these on the multiplayer server also, but that would require disabling our current map (I could switch back and forth though).

PS: I looked up that inventory editor mod and people say it does not work on multiplayer servers.