TSST SD-R5372 firmware update Q

Help a newbie out. I’ve used search and found alot of the info I was looking for, but can’t find this…
(background) TSST SD-R5372 firmware TU-31. I D/L’d TU-55 from Toshiba website but found TU-56 on rpc1.org.(/background)

Is TU-56 an unofficial patch since it is not on Toshiba?
I’ve read such things as flash utilities and updateing in SAFE MODE.
TU-55 is an .exe file and I would like to know what to expect.
:o

What is your Q??

Is TU-56 an unofficial patch since it is not on Toshiba?

TU-55 is an .exe file and I would like to know what to expect.

TU56 (Add 16X DVD-R support)

The firmware comes from Toshiba europe.