erm what's a 'white system message'? If you mean a message to a player thats white, why not just set its colour to white?
Also with removing buildings from the map... this could be problematic. I take it you've came from sa-mp which has this functionality, but SA is very different to GTA3 when it comes to objects.
For example, half of the buildings on the GTA3 map also include some roads, bushes and tress with them instead of just being on their own, other buildings are made from 4 or 5 different parts. The object system in GTA3 really sucks when compared with VC or SA. Might look into it one day but i can only see it being useful if you want to remove the entire map or certain islands and rebuild them with custom objects.
