1    fso = WScript.CreateObject("Scripting.FileSystemObject");
2    file = fso.GetFile("my_tm");
3    //открываем файл на чтение
4    text_stream = file.OpenAsTextStream(1);
5    str = text_stream.ReadAll();
6    text_stream.Close();

01    var Stream1 = WScript.CreateObject("ADODB.Stream");
02    var Stream2 = WScript.CreateObject("ADODB.Stream");
03    Stream1.Type = 2;
04    Stream1.Mode = 3;
05    Stream1.Charset = "??????";
06    Stream2.Type = 2;
07    Stream2.Mode = 3;
08    Stream2.Charset = "Windows-1251";
09    Stream1.Open();
10    Stream2.Open();
11    Stream1.LoadFromFile("my_tm");
12    Stream1.CopyTo(Stream2, -1);
13    Stream1.Close;
14    Stream2.SaveToFile("my_tm1", 2);
15    Stream2.Close();