WinCDEmu is an open-source software that allows mounting CD/DVD images by clicking at the image files in Windows Explorer. It supports both 32-bit and 64-bit Windows XP and Vista, is open-source and completely freeware. Supports ISO, CUE, BIN/RAW/IMG, NRG, MDS/MDF, CCD file formats as well as SMB network shares and includes a workaround for Windows cache bug. Each mounted image will be represented by a separate virtual CD device, as in MacOS. A drive letter can be chosen automatically, or selected every time you mount an image.