Those pieces of paper are probably schematic files. Make sure you're actually downloading world saves before you try installing them. Also, please do not necropost/bump/revive old topics, such as this. Thanks!~

InHazeSchematics are a special type of file the can be used with MCEdit and a few other minecraft editing programs. A schematic file is different from a world save as it is a specific section of blocks that are saved instead of the whole world. They can vary greatly in size and content from something as small as a single block, to a large building or even a whole map. They are best used to copy or import single items into your own minecraft world save.

how do i use a world save?

1. go to %appdata%
2. get to .minecraft
3. then get to saves or worlds
4. drag in th the world save into there
5. enjoy.
But it don't work.
Its not a folder or something.
Help! it shows up like a empty peice of paper do i change it to zip?

1. go to %appdata%
2. get to .minecraft
3. then get to saves or worlds
4. drag in th the world save into there
5. enjoy

hope it worked

Derp. What do you want to do?