At this point it's probably hard to determain what's the cause, if you have a complete backup of gta just copy that over to your main dir. You'll still keep all your scripts, then launch the game and see if it works. If it doesn't you know for sure that it's caused by a script mod. If the game functions properly I'd say get back to modding again and from this point install them one by one. Always test the first before installing the second (unless it's something minor like a few guns at once).