I'm using the following inf to accosicate .mp3 .mp4 files with winamp but if doesn't seem to be working can anyone help me out Thanks [Version] Signature=$CHICAGO$ [DefaultInstall] AddReg=Reg.Settings [Reg.Settings] HKCR,.mp3 HKCR,.mp4 HKCR,mp3file,,,"MPEG Layer 3 Audio" HKCR,mp3file\DefaultIcon,,,"%MP3ICON%" HKCR,mp3file\shell,,,"open" HKCR,mp3file\shell\open HKCR,mp3file\shell\open\command,,,"""%MPCPATH%"" ""%L""" HKCR,mp4file,,,"MPEG4 Video" HKCR,mp4file\DefaultIcon,,,"%MP3ICON%" HKCR,mp4file\shell,,,"open" HKCR,mp4file\shell\open HKCR,mp4file\shell\open\command,,,"""%MPCPATH%"" ""%L""" HKCU,%SMWCEF%\.mp3,Progid,,"mp3file" HKCU,%SMWCEF%\.mp4,Progid,,"mp4file" [Strings] SMWCEF="Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts" ;Editable Strings MPCPATH="%16422%\Winamp\winamp.exe" MP3ICON="%16422%\Winamp\icons\mp3.ico"