Ah, figured out the crash: it seems I was still subscribed to 4K Blast Pit textures even though it was also part of the same modders full Black Mesa HD mod; and although it never caused problems before I guess the game doesn't like having both of those and this one; unsubscribing from the blast pit textures fixed the issue.

Interrestingly the version of this mod without the Zombie Woman Scientist doesn't have this issue; there the texture loads in properly. Both versions of the mod now crash the game at reaching the Blast Pit control room; most of the tim ethey crash at turning the knob; if it doesn't crash there, it crashes at opening the door; the fartest I've come is right behind the next door with the security officer; who then starts flying around with swinging oversized arms like a helicopter; then the game crashes.

So, i just got back to the cafeteria through a vent; and there's a meat locker there wih some items in it; the door of the meat locker is a pink/purple "no texture here" graphic.

In c1a2b after the cubicles section where the vorts warp in, if you enter the left red door and look behind the two vending machines, there's an infinite void behind them.

THE WAIT IS OVER!!!! YEEEEESSSSSS!!!!!!!

@Raider yes

Will this ever be made compatible with the other chapter overhauls?