Also I think the NV file in the _MACOSX file is for a mac/laptop rather than pc.

No proplem man, sorry I posted so many times though. XD

I tried your advice and now it works, thanks for the advice!

Ok, you need to use the very first NV file you see. The one below The _MACOSX file, the NV file in the _MACOSX file doesn't work, that isn't where the world save data is.

Hope I've help, and one last thing, make sure your not on the page where you selecte a world, you can still have your minecraft open just don't be on the page with all your worlds.

Also, make sure you rename one of the NV files other wise the one will be removed with the more recent copy/extracted file.

Ok, I think I've seen where you've gone wrong. Go into the __MACOSX file then extract or drag the NV file in the _MACOSX folder, that's technically where the save is stored. Or I think you can alternitavly use the Nv in the actual folder rather than clicking and opening the _MACOSX folder, try both, make sure they are seperate though.

First of all, which file did you extract from, the zip or the folder? If you extracted from the folder, then that might be your problem, you need the folder itself I think, what I usually do is go in the zip file itself and drag the file to the saves section. What I'm going to do is test it and see if I can find where you went wrong.