I hope that you have downloaded the file picins.sty and succeeded
in using the SUN utility xv to produce a PostScript file of the
rabbit from the gif file called alice02a.gif that can be retrieved 
from our class 16 web page.

One way to get a 2 inch wide by 3 in high picture of the rabbit is 
to choose to adjust the size of the saved image while you are in
xv (that is, when you have chosen to save the image as PostScript
and named the file, you can use arrow boxes on screen to adjust the
dimensions of the PostScript image).  You could also choose to
save a full-sized version of the image and to rescale it for display 
by using the command \scalebox.  As you might guess from the name,
the \scalebox command takes a graphics box as an argument, so you
could, for example, have a command like

\scalebox{.3}{\includegraphics{rabbit.ps}}.

The first argument gives the scale factor, and the second argument
here is the box created by the \includegraphics command.
This will have the effect of reducing the the size of the displayed
image by 70% (that is, to 30% of the original size).  Our class 16
web page had the order reversed, stating that the \scalebox command
would go "inside" the \includegraphics command as an argument.
There is a similar command called \resizebox.

If we were using the package "graphicx" instead of "graphics", then
we could use extra optional arguments to the \includegraphics command,
which would make it unnecessary for us to use the \scalebox command,
but these optional arguments  are not available with the "graphics"
package. I believe that the enhanced package "graphicx" does not work
with the PicIns package.

You can find complete documentation for the graphics package by looking
up a document called "grfguide.ps", which deals with all the commands
and their options for the packages "graphics" and the package "graphicx."
Rather than go out to a CTAN site, you can find it on the SUN machines
under \usr\local\doc\tex.

The main difference betweeen the two packages is that there are more
arguments available in "graphicx".

To use the graphics package and the picins package, put the command
\usepackage{graphics,picins}
in the preamble of your source file.

--Dr. Karel