Now let's look at a zip, or compressed, file. In the illustration, I am using Winrar as my compression/decompression program, in this case, I am looking at free, downloaded content call "EvaXstarterPoses.zip". Notice the folder content of this zip, 1 documentation folder and 1 runtime folder.

I believe this is a V4 poses set from Powerage and it appears to be packaged correctly for immediate install.