To the point:
Use a fresh install of GTA IV. Install ELS 8.0. After that install LCPDFR 1.0d and let it replace any duplicate files because it comes with the newest versions.
Find your visualSettings.dat file in your GTAIV / common / data /
[ always Back up your config files before changing ]
Change the specified lines to these values -
car.defaultlight.emissive.on 30.00
misc.BloomIntensityClamp.HD 6.00
misc.BloomIntensityClamp.SD 6.00
misc.BloomIntensityClamp.SD.ps