Have you ever wondered why SMS asks you if the package contains source files? Does it always contain source files?
No, if you intend on running an application that is on the system then it doesn't. Say you want to copy files from one folder to another. You don't need to push the copy command down. You just run it on the system. In this aspect the package doesn't contain any source files. It does contain the program command "copy x to Y"
