Here's 2 pics from using Better_Damage_Texture_V2.rar. Shots were a few HE from the deck-gun. The marks aren't that dark, but at least show something. It looks better on different ships too.
I have ATI video now but this mod worked fine with an Nvidia FX5900 too.
Pretty sure 'damage_metal_a.tga' file is for deckgun damage.