Since lot's of people ask about this, here goes a video, showing you how to avoid any errors while installing LCPDFR. This was recorded on Windows 7, with LCPDFR RC2R2, it might vary on other OS' or other LCPDFR versions. I hope you can understand me even though I've got my accent going on.
(I recommend watching on 720p)
Important notes written out:
- Run as Administrator
- Disable Read-Only on your GTA IV folder
- Make sure you've got 4 green ticks in the Wizard