Points + lines in trellis

[David Parkhurst <parkhurs@imap.iu.edu>]

Using s-plus Enterprise Developer Version 7.0.6  for Microsoft Windows : 
2005
I have data for four situations, and for each I have a few (c. 4--6) 
original data points, and about 100 points for non-linear functions fit 
to those data.  (The functions differ among the situations.)  Is there a 
way to use trellis to make a 2x2 grid of plots, each containing the raw 
data as points, and the fitted functions as lines?
I know how to create a graph sheet using mfrow to put these plots in a 
2x2 grid, but can this be done with trellis specifically?
Thanks.

David Parkhurst