All it says is to browse until you find the mod. I found the mod but there are no selectable files..... How do I put the winrar stuff in an archive? The help file svcks.
Easy, but first you need to make sure the rar file contains a file structure that OBMM can work with, IIRC. Allways look for omods or omod ready archives. Anyway:
If the rar has a structure where the texture, meshes, sound, etc, folders are in the root (as well as any esp, esm, bsa files then it is good to go.
When creating the omod file, choose 'from archive' then browse to the rar file and select it.
Then just click create omod. That is it.
If you have a rara file that is not like that then extract to a directory. The to create omod, choose add folder, browse to the folder that has the textures, meshes, etc. files and choose it. Then click create omod.
Try it out.