I just put the exe in system32; renamed it to nfo.exe Also put the langdlls folder in system32 with the DAMN_NFO_Viewer_ENG.dll in it. Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.nfo] "Application"="nfo.exe" [-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.nfo\OpenWithList] [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.nfo\OpenWithList] "a"="nfo.exe" "MRUList"="a" [HKEY_CLASSES_ROOT\Applications\nfo.exe] [HKEY_CLASSES_ROOT\Applications\nfo.exe\shell] [HKEY_CLASSES_ROOT\Applications\nfo.exe\shell\open] [HKEY_CLASSES_ROOT\Applications\nfo.exe\shell\open\command] @="\"%windir%\\system32\\nfo.exe\" \"%1\"" [HKEY_CURRENT_USER\Software\****\**** NFO Viewer] "CheckDefaultViewer"=dword:00000000 "ReuseWindow"=dword:00000001 "Language"=dword:00000409 "AlwaysOnTop"=dword:00000000 [HKEY_CURRENT_USER\Software\****\**** NFO Viewer\NFO] "FontName"="[built-in] Terminal" "FontData"=hex:8f,00,00,01 "Window"=dword:00000023 "BackgroundColor"=hex:ff,ff,ff,00 "TextColor"=hex:00,00,00,00 "HyperLinkColor"=hex:7a,96,df,00 "HyperLinkHoverColor"=hex:00,54,e3,00 "Text"=dword:00000400 [HKEY_CURRENT_USER\Software\****\**** NFO Viewer\Recently Viewed Files] "MaxMRVSize"=dword:00000009 [HKEY_CURRENT_USER\Software\****\**** NFO Viewer\WindowPlacements] "Main"=hex:2c,00,00,00,00,00,00,00,01,00,00,00,ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,\ ff,ff,ff,ff,ff,ff,32,00,00,00,af,00,00,00,32,03,00,00,c1,02,00,00