[plt-scheme] Henderson picture language in version 4.x?

Hi everyone,

I am trying to run a version of the Henderson picture language stuff
for my students.  It works fine in PLT 3.72 with Textual (MzScheme,
includes R5RS).  The images display in the listener.

In PLT 4.1, I can load the code when choosing Full Swindle, but
instead of images in the listener, I get a lovely "image-snip"
message:

> (paint (load-painter "einstein"))
#<image-snip%>

Can anyone point me in the right direction?  The code I am running
from my colleague Holly Yanco's last version, problem set 4 at
http://www.cs.uml.edu/~holly/91.301/ .

Thanks all.

Fred