You need an original disc in the drive still, so at that point you might as well burn a copy of Swiss.
I wrote this updated firmware. It works. It requires "a disk" in the drive, not necessarily an original one. However, as you say you may as well burn swiss. But if you've lost your copy, or like me like to run your games off of the drive and be able to run homebrews without swapping the disks, then it's cool.