It works as easily as described here. But there is probably not enough time left to apply it towards the 2004 amtrak 25k limit.

I transfered 25k CO -> Amtrak last week (Weds I think). Showed up on Monday in my Amtrak Account. I transferred yesterday from Amtrak to Hilton. Showed up in my Hilton Account this morning. About 6 days total.