Finally found out the hard way why its so unstable
1: Disable all ingame AA that causes the unpredictable crashes for me anyway on Nvidia 344.11WHQL Win 7 x64. Part of chapter 5 is broken with SMAA anyway you cannot see the screen at all its blurred allover. Terrible QA they obviously never tested that in any way its game breaking
2: Do not use the dev console at all. Add the commands to the .cfg file on your PC instead binding them to keys if you need to.
3: Do not use any trainers as they cause save game profile corruption. Add the builtin cheats to the local .cfg file then bind keys to them.
4: Do not use the Flawless Widescreen aspect ratio fixes it also causes save game profile corruption as it works by memory hacking on the fly. The game detects this & corrupts your saves in certain places making them unuseable.
5: Do not breath EVER & I mean EVER when playing this game
not even once
incase it breaks the save game system & or causes the universe to implode due to space time mystery vortex butterfly effect
The game must contain strong anti cheat detection which also picks up legit fixes. Anyway I have found play the game with those massive black letterboxes & no mods/fixes with a brand new profile (delete your old one its most likely corrupt somewhere mine was!).
Now finally the game is stable
its still dated in places but also a playable survival horror game which heavily rips off Silent Hill 2-5 on PC as well as Resident Evil 4.