Hodge Podge,
Did you ever find out what happened to your engine? Mine's been making a rattling noise that seems the same as your description. I've been driving mine for about 1,000 miles since it began.

For anyone wondering why I would drive my '99 SVT with a severe engine noise for that long, my contour is my beater car. It has been hit twice by idiot drivers and has never been the same since. It creaks, rattles, has a warped dash, and overall is a clunker (with only 57,000 miles).

Thanks,
Dave