The gag mod can be found in the
Modguy's loader mods archive2, which is available in
sby's thread.
It's an old mod and the code wasn't written with Loader techniques. It will probably work in the vanilla game, but the inter-mod compatibility may be poor
(because it uses brute-force manipulation of game variables). Since the mod simply tells the game that the gag
doesn't exist, the girl's mouth will animate normally during speech - and therefore her lips will clip through the gag.
I don't intend to support or update this mod, so I'm not going to make it available as a
Download.
I'd advise you to check out the
Dialogue board. Several of the advanced dialogues use the {"style":"thought"} marker to denote the girl's internal monologue. THOUGHT lines should play out
regardless of any physical obstructions in her mouth. This may be a better fit for your project. Alternatively - if the gag is just included
"to build atmosphere" but you want the girl to participate normally - then you could
remove the gag from her mouth entirely.