I'm having an TSST TS-L633B DVD RW on my Dell 1545, running on Windows Vista.
Unfortunately this DVD player is blocked in region code 1. However I hope to have this region free (do note I'm located in Europe and stuck with most of my region 2 DVD's).
The firmware has been update to the latest available version on the Dell website (D400) (this is the link).
Also I was trying to install the latest driver from RPC1.org, however when trying to install this I got the error message that the firmware is not compatible with the selected drive.
Herewith the full information when running wininquiry:
Model name: TSSTcorpDVD+-RW TS-L633B
Version: D400 (update, previously D200)
OEM Code: DE
I trust the above is providing enough information, however let me know in case something else is needed.
Thanks in advance for your support!