The FastPictureViewer Codec Pack is a one-stop shop that enables support for 44 additional image formats in Windows Explorer, Windows Photo Gallery, Windows Photo Viewer, Windows Live™ Photo Gallery and, on Windows 7, also within Windows Media Center and Windows Media Player 12, with full 64-bit compatibility. The Codec Pack supports raw formats from more than 350 digital camera models from all top manufacturers and supports CR2, NEF, DNG, SR2 and more, as well as Photoshop PSD and specialists image formats like OpenEXR, Radiance HDR, TGA, DirectX DDS, etc.
The Windows Media Center doesn't support many formats that we usually use. This is a solution to it.
R5 is the old 2.3 version. R6 is version 2.5.