Is there something I have to do in the code in order to get this to work?
Is it a build setting in the FLEX project?
Can I do it from the SWF after it's been built in release or debug mode?
I need the projector file so that I can call an external EXE from within the fscommand subdirectory using the fscommand function call.
If I understand what a Flash Projector File is; then you cannot create one from Flash Builder.
You can, however, create an AIR app and use Captive Runtime to create a .EXE file from a windows machine. From within the AIR Application; you can use NativeProcess to execute an external EXE file.