rv = gXPI->InstallJar( iFile, args.GetUnicode(), aFlags, gNotifier );
rv = gXPI->InstallJar( iFile, URLstr.GetUnicode(), args.GetUnicode(), aFlags, gNotifier );
PR_PUBLIC_API(nsresult) XPI_Install(#ifndef XP_MAC                                    const char* aFile, #else                                    const FSSpec& aFile,#endif                                    const char* aArgs,                                     long aFlags         ){    nsresult                rv = NS_ERROR_NULL_POINTER;    nsString                args(aArgs);    nsCOMPtr<nsIFileSpec>   iFile;    nsFileSpec              file(aFile);    NS_NewFileSpecWithSpec( file, getter_AddRefs(iFile) );    if (iFile && gXPI)        rv = gXPI->InstallJar( iFile, args.GetUnicode(), aFlags, gNotifier );    return rv;}