You can summon creatures with console, or just browse with NI to see if there are BG1 sounds in BG2 creatures and vice versa. But that won't account for possible script changes.
I don't know if moving to chapter would be enough.
You probably could jump to last area, ctrl-y the end boss and let it proceed naturally.
Re: Extended soundsets for NPC
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Re: Extended soundsets for NPC
I will try and report.