My downloaded file from Nexus is "Robert_Male_Body_Replacer_v52_OMOD-40532-1.omod " not zip. I use Internet Explorer 10.
Have you tried to rename the zip file to omod ? then put it in the OMod Folder and activate it.
You file size seems fine
If I download your file I get a omod file.
I placed it in my OMod Folder , start OMM and it's shown as OMod ( I have not activate it, don't want to overwrite my male Mods )
I extract the OMod to a Folder and get these files
OMod.jpg 54.06KB 1 downloads
( if I unpack the file with 7z I get the files you showed in you last Posts. And those files you can not use to create a OMod. )
I extracted my Nexus OMod and the same files are inside, same size.
So rename your zip to omod , put it in your OMod Folder, start OMM and activate it.