1. In a local computing device that includes a customization module that receives one or more input files and generates at least an output file, a method for customizing a binary content file without recompiling source code associated with the binary content file so as to modify the behavior of the binary content file when the binary content file is executed at a destination computing device, the method comprising the following: an act of receiving a binary content file that includes variables that are assigned current values; an act of receiving a script file that includes references to updated values for one or more of the variables; and an act of processing the script file to change the current values of the one or more variables to the updated values for the one or more variables.