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procedure ReUniteFile(const Files: TStrings; const FileName: string);
var
  f1, f2: TFileStream;
  i: integer;
begin
f1 := TFileStream.Create(Filename, fmCreate or fmShareDenyWrite);
  try
  for i:=0 to Files.Count-1 do
    begin
      f2 := TFileStream.Create(Files[i], fmOpenRead or fmShareDenyNone);
      try
        f1.CopyFrom(f2, 0);
      finally
        f2.Free;
      end;
    end;
  finally
    f1.Free;
  end;
end;