@cyperghost It is finally working now. I just scrapped running it off the flash drive for now, and just copied the pak files to the microsd, and unpacked it off there. If anything, I could just copy the unpacked stuff back to the flash drive later on, if I really want to run it off the flash drive later. Thanks so much for your help on this, and for bearing with a complete noob like me. Sorry to bother you a whole year after this was last posted, and thank you for the working script!
I hope the controller mapping and config isn't too painful, requiring another script to configure....