First download this mod by stillhere: https://www.gta5-hub.com/scripts/voice-player
(I'm assuming you already have)

After installing that mod, install my mod in this location:
GTAV/scripts/voice player

Drag and drop my files there.

Rename the "ironman voice" folder to the name of any one of your created ironman peds.
done!

In game, change your player model to the model you assigned and press the voice button (default: E on keyboard, Dpad-Right on controller).

ENJOY!!!