Hi everyone, I read a post about File Extensions Unattended. but i have a question, i make a .reg with the Soft WAssociate and import the keys to a .reg. does is the right way to registering the file extensions in Runonceex? this is the code: REGEDIT4 [HKEY_CLASSES_ROOT\foobar2000.aac] @ = "Audio file (AAC)" [HKEY_CLASSES_ROOT\foobar2000.aac\DefaultIcon] @ = "%PROGRAMFILES%\\foobar2000\\icons\\aac.ico" [HKEY_CLASSES_ROOT\foobar2000.aac\shell] @ = "play" [HKEY_CLASSES_ROOT\foobar2000.aac\shell\enqueue] @ = "Enqueue in foobar2000" [HKEY_CLASSES_ROOT\foobar2000.aac\shell\enqueue\command] @ = "\"%PROGRAMFILES%\\foobar2000\\foobar2000.exe\" /add \"%1\"" [HKEY_CLASSES_ROOT\foobar2000.aac\shell\open] @ = "Open in foobar2000" [HKEY_CLASSES_ROOT\foobar2000.aac\shell\open\command] @ = "\"%PROGRAMFILES%\\foobar2000\\foobar2000.exe\" \"%1\"" [HKEY_CLASSES_ROOT\foobar2000.aac\shell\play] @ = "Play in foobar2000" [HKEY_CLASSES_ROOT\foobar2000.aac\shell\play\command] @ = "\"%PROGRAMFILES%\\foobar2000\\foobar2000.exe\" \"%1\"" that is all! , any suggestion about this?