I did a fresh installation of GTA IV with using only these mods:
NYPD car pack
GTA IV has been updated to 22.214.171.124
The issue I am having is when playing lcpdfr online the police computer seems to screw up when using the chat or opening up the phone. The Police computer seems to be transparant on the screen and sometimes when going into the computer I can't get back into gameplay unless I press Alt 12. Sometimes is gets bad to the point I losse textures.
I'm not sure if it is spark IV, because all the files are in the GTA IV directory, because that's the only way Spark IV will work because I have windows 7 64 bit.