I got gta iv and fixed everything so it works fine and had LCPDFR with mods working too. I installed the coroners mod and played and it worked fine about 4 days ago and then 4 days later (today) I load up gta iv and it loads fine but as soon as I get to the police station the game crashes. Then I try to launch Steam in admin mode to play GTA IV but then it said I have to reinstall steam. So I reinstalled steam but did not delete the games I guess it was a steam related issue. I load GTA IV and then it works fine for abotu 5 minutes while playing lcdpfr and then I try to pull a car over and the game crashes. I check my launch options and they were all deleted so I put them in again and then GTA IV still does the infinite loading screen and then sometimes loads the game in and then the screen dims and then goes black and then the game crash. So I resinstalled GTA IV with a backup I had but still the same thing. I researched for days on how to fix this and finally got it working but now it stopped working. I looked up other websites on how to fix but a lot seem to not work or there specifically working for people becasue they can communicate with the person who is trying to help.          Thanks in advance... 

What are your system specs?

So You have looked and looked to fix it? Why didn't you go straight here and ask here?

P.S. Try to totally reinstall Grand Theft Auto IV and totally reinstall Grand Theft Auto IV and move all of your mods except LCPD:FR to your desktop and see if it will launch and will let you play if not then, sorry I can't help you, sorry