: Use a tool like WinRAR or 7-Zip to open wm.rar . Most versions of this mod include a text-based "Guide" inside the archive itself.

: Locate your Final Fantasy VII installation directory.

If you are looking for a different "wm.rar"—such as one related to or a specific software license —please let me know, as the name is sometimes used for generic "World Map" assets in other games or technical archives.