I want to make an entrely new voicetype, with at least combat/detection/ possibly misc sounds.
matter is, if I try to edit an existing one like CrUniquePaarthurnax in the combat field, it does not allow me to create any new dialogue. I select Combat topic, then in the new window I try to add a new one but nothing, does not allow me not even to copy existing ones. What am I doing wrong?

Are you trying to create new topics, or new infos? I think you can only have one of each kind of combat topic--there can only be one "Attack" topic, one "Hit" topic, etc., in the quest.

I think I meant new infos then. the actual quotes.

but can we expand on topics? like, Cast spell or those fall in the "attack" topic?

Topics are hardcoded I think. and custom dialogue, surprisingly enough, is made via the quest tab in the object screen. incredible. but if should allow for a better handling of instances rather than, say, NWN voiceset.