Hi uh Krapmeister. You can check which firmware version you have, search for it online, then revert back to it easily later, if you wish. You can switch back and forth between each HanLin V3 firmware version. There's install instructions at Jinke's website. I'll check the URL and post it in a sec...
... and I mean it from the bottom of my heart.
I bet you're Australian.
Edit: OK here's the link:
http://www.jinke.com.cn/Compagesql/E...ice/update.asp
V2.02EN 2009-01-20 is the latest Jinke firmware, but there's other versions available, too. Remember to backup your files before you do an update and note that the file at this link resets your Mobipocket PID, which is not a problem if you haven't purchased any Mobipocket books yet.
Oh, and welcome to Mobileread!