Thanks very much!
I have (had) no idea about scripts, but with your info I deduced that if the things are written in Javascript (which I didn't know) then I could maybe find a Java alphabet of sorts. So, that's what I did, and I now have a perfect FAB output without any further formatting needed!
The thing with the line breaks in the region texts was a long shot - I figured there was maybe a way to encode a command that the script would automatically read and then split the line to produce proper two-line subtitles.
Anyway, thanks for your help.
alexz