You know, if you use Windows 10 and not putting so much mods and cars, then GTAIV lcpdfr is very stable and not crash at all...
In my GTA IV are PoliceHelper, all possible lcpdfr callouts, few scripts (Traffic flow, AREA LIVERY MOD, braveheart's, policing script and breathalyser, ALL moded police cars, ELS and enb series... I be honest, I have no chrashes and game is stable, it chrashes when I start to put too many civil car mods, taxi cars and experiment with enb..