First I would recommend you to watch the FULL tutorial video of how to properly install LCPDFR.
Here is the link to it:
http://www.youtube.com/watch?v=-DDoyA56FnY
Can you go to your game directory (ie. C:Program Files (x86)Rockstar GamesGrand Theft Auto IV), find "ScriptHook.log". Once you have found it, copy everything in it, paste it in this topic (or message me). When you paste it, make sure you paste it in a spoiler.