Hello again, everybody!
Unfortunately my previous "solution" (suggested by LiteON support) is not working properly: YES, that ltnlt.exe will bring back LabelTag as an option in Nero 10 , but after the video/data burning - the software will NOT burn the LabelTag too (some error). I broke already15-20 DVD trying different things.
If this is working for someone, please let me know !
The conclusion is one for me: the LiteON support is as "serious" as the Nero Support.
COMPROMISE SOLUTION: This time I tried from the start to the end and is working well - take ALL the content (copy) from C:\Program Files\Nero\Nero 9\Nero Express and just paste it replacing the content from C:\Program Files\Nero\Nero 10\Nero Express .
DISADVANTAGE: You will have now a Nero 9 Express in your Nero Multimedia Suite 10 Platinum HD.
ADVANTAGE: LabelTag is working fine and all the rest of your Suite 10 will still be there with all the features, including Nero Burning ROM 10 (what you loose - as feature - in Express you can still use in Burning ROM).
If there is someone who does not have anymore the Nero 9 Essentials Express I can upload the content of my C:\Program Files\Nero\Nero 9\Nero Express (NOT an installer, only the content to replace). Just ask.