I could also use an orginal firmware for the wrr-4848, there is the 4048 at the site mentioned above. I got that and the flash kit.
I did a save on my 4848 and now it burns ,but still with some problems. Before doing a save (using the flash program) it would not write at all.
I need to find a clean wrr-4848.bin. It is not on the arteck.
All I did was load Turbo Tax 2002 on my machine, and away when the wrr-4848, it would not burn at all,that s/w somehow wrote to the firmware and turned off the burn mode.(very interesting).