After installing LCPDFR, a few other mods, and changing some vehicle models, I was experiencing an error where the game would crash directly after the loading screen. I looked into this and found I had both the dsound.dll and xlive.dll in the install directory. After deleting the xlive.dll, the game would not start whatsoever. I have tried un-checking the read-only tab (seemed to keep re-checking itself however) in the LaunchGTAIV.exe and have tried running it as administrator. I tried screwing around in the directory, downgraded ELS v7 to v6, uninstalled Simple Trainer and even uninstalled LCPDFR. I did re-install LCPDFR but it didn't seem to help me. If you need any other info, please ask, thanks.

EDIT: After running G17 Diagnostic Tool:

I have installed LCPDFR, (even though I am 100% sure I had them installed already, I did it just to verify they were there) I installed an ASI loader and C++ ScriptHook and the .NET Scripthook aswell.

Edited January 12, 201412 yr by Weesledun84

Could I see a screenshot of your GTA IV directory, and we'll take it from there. 

Now I'm experiencing a different problem. I looked more into my previous problem and ended up uninstalling all the mods I had installed. The diagnostic tool showed everything was installed and okay to use. Now when I start the game, I see a black screen for about 3 seconds and then the program stops working.

Still, can I see a screenshot? It is really helpful :) 

Here:

Which version of LCPDFR are you trying to install? 

0.95

You are aware that there is a new version out and that 0.95RC2 isn't really supported anymore? 

Edited January 13, 201412 yr by ineseri

Actually no, I wasn't aware. I just bought GTA IV and from past experiences with LCPDFR, I came here just looking for a download link. 

Here is the link (http://www.lcpdfr.com/files/download/4607-lcpd-first-response/). Read the included manual. I recommend you to use the manual installer. 

I still need help though, even after uninstalling LCPDFR, I am still getting the same error.

Are you sure that you did remove it completely (http://www.lcpdfr.com/page/tutorials/index.action/_/script-data-file-modification-tutorials/how-to-uninstall-lcpdfr-r19). 

Yes, everything listed in the link provided has been removed, yet the program still refuses to work. I am starting to think it was the vehicle models I installed, but I don't know how to be sure. Also, of course I was dumb and didn't make a backup.

Well, if you haven't made a backup you will have to reinstall to make sure sadly.