Finally I've managed to set this up.
Putting my experience here, hoping it will help someone and would be on top of google results.
There are reasons for me to keep 9.64 instead of using 10.x versions. The one reason is that opera 9.64 is somehow more secure, since, most users usually upgrade to newer version (since opera is not windows/linux-bundled) and newer versions look nicely. I don't need new functionality that is bundled with 10.x tree, the other reason for why I'm...