I am having a new problem.

When Isaea Roenall came ot fetch his "betrothed" this happened:

At first Roenall's dialogue functioned completely as it should, but after it's completion the screen just froze and nothing happened.

I was just exiting Rayric Gethras' house and Roenall and his goons appeared in a tight corner between the building and a wall. Might it have trapped him there making him unable to move, or is something else afoot?

You are probably right, try reloading, and pray...

If that doesn't help, teleport to another house and exit.
Eg. CLUAConsole:MoveToArea("AR0305")

I say kill that bastard on sight!

Just kidding, Vedran's advice is quite fitting.
How is he trapped exactly? Is your party involved?
You could Ctrl-J them out of there giving him space to move.

Heh, you mean Ctrl+Qing him, Ctrl+Jing and then kicking him out? Hehehe...
I doubt it would work.

I was talking about moving the party out of the way by jumping to another map-point.