Multi-session driver
Thank you for your feedback and suggestion. Unfortunately there will be no multi-session driver anytime soon as it is simply too time-consuming to develop for too little customers at the moment.
BTW: The Virtual CD Editor supports multi-session, but I presume that this is not the feature you're looking for. I think you just need a multi-seesion driver for 3rd party burning tools in order to test burning multi-session before burning it to a real blank media...