finding the parent script

Im trying to get a program to copy itself to other programs …but it can be called anything so is there any way to find what the program the script is running from is called i.e. fs.open(script.parent,"r")
If you need to know im making a load of virusses to test my antivirus and this will be a part of the virus

thisProgramName = fs.getName(shell.getRunningProgram())

shell.getRunningProgram() returns the full path,
fs.getName() will make it return the last name

ok thanks :D/> very useful