There is no train service between Santiago and Viņa. The way to get there is by bus, which is easy, cheap and safe. Buses leave from the bus terminal, adjacent to the Universidad de Santiago metro station, every 10 minutes. One way fare is about $4. The trip takes a little less than 2 hours.
Let me know if there's anything else I can help you with.
PS: When will you be in Chile? Maybe a mini-FT reunion is in order...
[This message has been edited by Jim_B (edited 02-02-2000).]