Is there any possibility (some (new) third party product) to burn CDs under QNX4/Photon?
There use to be one but apparently it was VERY expensive. I think it’s not available anymore.
There is a third-party program QCDR developed by Russian company.
You can visit 
kpda.ru/faq/index.php?action=show&cat=380707 to find out some information about it.
As far as I know they can send limited demo version for test purposes.