Thanks for the tip, seems to take out quite a few mistakes. Only issue now is that making bitmaps using the default map San Andreas comes with, is that some places aren't simply on them, or drawn incorrectly, in Red County there's a road that's completely off on the map (thus has grass growing on it in my script). I'm probably going to take a HD map and paint the areas I want to generate manually.
Actually, nevermind. I do have a question though, in your bitmapping object placement, did it occassionally happen that an object ended up on a roof (not all the time, just sometimes)? And did you find a solution for that, or just lived with it?