Simply No Screenblood
Simple mod that I made for my own personal preference, and decided to share in case other's find it useful. The title says it all, this mod simply removes the screen-blood effect when you get shot, only leaving the small red damage indicator. I found the screen-blood obnoxious and cumbersome, as well as unnecessary as it acted as a secondary damage indicator (even though there's already smaller, less intrusive one).
Installation is simple. Drag and drop 'pc' in to your Mafia II install folder. Replace all files.