Update the description of how to start an interpreter and determine the

installation prefix and exec_prefix for Windows.

Doc/inst/inst.tex

@@ -361,12 +361,13 @@ run-time.  They are always the same under Windows and MacOS, and very
 often the same under \UNIX.  You can find out what your Python
 installation uses for \filevar{prefix} and \filevar{exec-prefix} by
 running Python in interactive mode and typing a few simple commands.
-Under \UNIX, just type \code{python} at the shell prompt; under Windows,
-run ``Python 2.0 (interpreter)'' \XXX{right?}; under MacOS, \XXX{???}.
+Under \UNIX, just type \code{python} at the shell prompt.  Under
+Windows, choose \menuselection{Start \sub Programs \sub Python
+2.1 \sub Python (command line)}.  Under MacOS, \XXX{???}.
 Once the interpreter is started, you type Python code at the
-\samp{>\code{>}> } prompt.  For example, on my Linux system, I type the three
-Python statements shown below, and get the output as shown, to find
-out my \filevar{prefix} and \filevar{exec-prefix}:
+prompt.  For example, on my Linux system, I type the three Python
+statements shown below, and get the output as shown, to find out my
+\filevar{prefix} and \filevar{exec-prefix}:
 
 \begin{verbatim}
 Python 1.5.2 (#1, Apr 18 1999, 16:03:16)  [GCC pgcc-2.91.60 19981201 (egcs-1.1.1  on linux2