[Files]
Source: "unzip.exe"; DestDir: "{userappdata}\{#MyAppName}\{#InputFolderName}"; Flags: ignoreversion 

[Run]
Filename: "{userappdata}\{#MyAppName}\{#InputFolderName}\unzip.exe"; Parameters: "{userappdata}\{#MyAppName}\{#InputFolderName}\fr_webapp_v6.zip -d  {userappdata}\{#MyAppName}\{#InputFolderName}"