Are people able to use custom voice sets?

I just tried adding my first custom voice set to BG:EE (it was actually the default female voice used in BG2, which I had already imported into my original BG1). I was able to get the voice set to appear among the list of voice options, but after choosing that voice, my char doesn't make any sounds when I click or move her.

What is the latest word on using custom voice sets? Are others here able to make them work?