procmail script?

Hello,

In the man page it gave a script which is supposed to run procmail on 
systems that aren't able to use .forward files but there wasn't any 
information on how to configure the script correctly.

Anyone know how to do this? Also--how would you run the script?

The following is the script:

          #!/bin/sh                                                            
                                                                               
          ORGMAIL=/usr/spool/mail/$LOGNAME                                     
                                                                               
          if cd $HOME &&                                                       
           test -s $ORGMAIL &&                                                 
           lockfile -r0 -l3600 .newmail.lock 2>/dev/null                       
          then                                                                 
            trap "rm -f .newmail.lock" 1 2 3 15                                
            umask 077                                                          
            umask 077                                                          
            lockfile -l3600 -ml                                                
            cat $ORGMAIL >>.newmail &&                                         
             cat /dev/null >$ORGMAIL                                           
            lockfile -mu                                                       
            formail -s procmail <.newmail &&                                   
             rm -f .newmail                                                    
            rm -f .newmail.lock                                                
          fi                                                                   
          exit 0                                                               

Thanks,

Ben