Sorry man, but you are asking the wrong guy. I wish I was one of the testers. I mean... it wouldn't have been so difficult for Paradox inviting me (being so that I live in Stockholm). But maybe next time.
As for the Byzantine DLC, you don't happen to be speaking of the Conquest of Constantinople DLC right? Beacuse that is just a 10 minute long music pack. (Which I wish I had)
What I can say is that even though I was not a a tester, I was expecting the converter. It had been promised for way too long. And living in Stockholm does have it's benefits.