Well I’ll be damned, not only is that true, but it works in Black Mesa. I took the tripmine sound, had it open in WMP (my keyboard has a play button, so I can play it without tabbing out) and added it to BMS. The direct comparison makes it extremely noticeable. I’m not sure what Source does or it’s limits to it (Will it affect non-HL1 low quality sounds? Or what if you modify the sound? etc), but I gotta say that’s pretty damn amazing.
Anyway, about the animations. I don’t know anything about modeling, but wouldn’t it be possible to just edit the model switch the names of the animations around?