1. Unzip your Chars, Stages, Mugen Game
Chars and Stages are usually uploaded in compressed files. Example: RAR or ZIP
If you want to unzip this kind of files you need to use a special software like 7zip or Winrar
If you have Winrar right-click on the file and select extract here.
If you have 7zip right-click on the file and select 7zip, then extract here
Now your file has been decompressed.