The following should be editted and inserted into papco's startup file:

    ; POLAR/HYDRA IOWA
    print, 'Adding POLAR/HYDRA module...'
    !path= !path + ':' + expand_path('+/hydra/module/path/)


All other configuration is done within PaPCo.  Select:
    PO_HYDRA->Configure  and fill in the fields.

Questions/Comments gladly accepted: 
    Jeremy Faden
    Programmer/Analyst, University of Iowa
    jbf@hydra.physics.uiowa.edu


Good Luck!
