An interesting article about Kim Jong Il's private train was recently published by "The Chosun Ilbo":
Another interesting article:
In 2001 Kim Jong Il visited Moscow using his private train. The route was via the North Korean/Russian border at Tumangan/Khasan.
Detailed reports in Russian are available at http://www.transsib.ru/Article/article-digest02.htm
You might use http://translate.google.at/translate_t# to translate it.