I have heard something about a different approach of the LyX developers on PDF export in 1.1.6 or 1.2. 3. make it possible to call lyx2pdf from LyX directly 4. Clean up script output 6. So, we have mailing lists, etc. I am thankful with anyone who wants to help me somehow.
Information is welcome as well.
I think, I will have the time to reply properly next weekend.