There doesn't appear to be much that's complicated. The first (uncommented) line runs the command dirname on the first command line argument (which is the script name) and stores the result in Script_Dir. The next three lines just seem to assign the values passed as the next few command line arguments to some variables.
Have you tried looking for a tutorial on KornShell scripting?
Last edited by Nylex; 10-14-2010 at 03:48 PM.