1. Unarchive the package and use the files from Release folder if you're running Windows 9x/Me or Release Unicode if you're running Windows 2000/XP.
2. Copy DLL or AX files in system32 folder [ C:WINDOWSsystem32 ]
3. Click on Start > Run...
• To install the files, type: regsvr32 filename.dll or regsvr32 filename.ax
• To uninstall the files, use: regsvr32 -u filename.dll or regsvr32 -u filename.ax
4. In the end, you should receive a message saying that your file was succesfully installed/uninstalled.
An easy way to register/unregister [install/uninstall] the files is to use one of these small tools:
• RadLight Filter Manager - can be used to list all registered codecs and to register or unregister codecs.
• DirectShow Filter Manager: helps to list, sort, find, add or remove DirectShow filters.
• RegShell - a handy utility that will help you avoid the inconvenience of running regsvr32 from the start menu all the time.
• DllRegSvr - allows to register/unregister DLL and OCX codec files using RegSvr32 tool.
• Emsa DLL Register Tool - register dll/ocx filters, codecs... and get extended file informations.
Some of the more common filters
• "iviaudio.ax" - WinDVD Audio Decoder filter.
• "ivivideo.ax" - WinDVD Video Decoder filter.
• "claud.ax" - PowerDVD Audio Decoder filter.
• "clvsd.ax" - PowerDVD Video Decoder filter.
• "DSCinemAudioDecoder.dll" - CineMaster v4 Audio Decoder filter.
• "DSCinemVideoDecoder.dll" - CineMaster v4 Video Decoder filter.
Note: Sometimes you need to specify the fully qualified path name to files (i.e. c:program filesintervideocommonbiniviaudio.ax)
• Related links:-
How to (re)install Default Codecs in Windows XP/2000-
Adding and Removing Default Codecs (and MCI) in Windows 95/98/Me-
How to fix Class not registered or 80040154 error-
How to Get the Codecs Downloaded Automatically to Windows Media Player-
What Codecs Should I Use? 
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