Sony CRX225E

I own the drive mentioned above, and would like to know how I would go about updating my firmware. The firmware section in CDFreaks does have Sony listed, but not my drive. I once heard that many Sony’s are rebadged Lite-Ons, and someone said mine was. Would I update my firmware through Lite-On? And if I do, how do I know which drive to use?

Take a look here: http://www.sonycrx2xx.org