This script (sit = Shuffle Interactive Tool) allows the user to quickly see shuffle results and then run a gstar-like tool to select probe stars in each of the 4 probes sequentially (gc1 first, followed by wf1, gc2, wf2).

 
% sit 
Usage: sit 272 273 E  
arg1 - htop index for first pointing   
arg2 - htop index for second pointing  
arg3 - meridian direction 

% sit --help 
sit:
  Shuffle Interactive Tool 
This is used to read the target_setup shuffle files and derive candidate 
jumpstars. 

Usage: sit 272 273 E  
arg1 - htop index for first pointing   
arg2 - htop index for second pointing  
arg3 - meridian direction 

You will be queried about displaying the shuffle finding charts.
When the gstar-like display opens you will be stepped through the 
process of selecting targets for gc1, wf1, gc2, wf2 (in that order). 

After the last probe star is set you will be shown the first 3 lines 
in the HETcommands file, and the mgp line needed to set the probes on 
the stars you have just selected.  Here is an examples:

# sn17iws_056_E
\cp -f ACAMimages/sn17iws_056_E.jpg /data1/nossy/www/html/noss/htopx2/acam_dss.jpg
syscmd -T 'load_trajectory(ra=8.71337, dec=13.933114, equinox=2000.0, dir="EAST" )'
mgp -radec -traj next -gc1=08:42:19.802,+13:49:07.10, -gc2=08:42:40.304,+14:04:47.55, -wf1=08:43:24.092,+13:56:23.63, -wf2=08:42:11.029,+14:00:52.69