hi game programmers,

I have some questions about generating particles. i'm making a racing game, where drift is an important part of gameplay. I'm using sprites to do the tire marks on the asphalt, but i'm not sure how to make all cars on the track generate them(assuming only the rear wheels are generating tire marks, for best perfomance).Is there any way to do it without coding the same thing to each car(that is, without repating the same code eight times)?

Also, I'm using ent_createlocal() to generate them, because the tire marks must be always laying on the ground. Thought particles seem appropriate, it wouldn't work for me because they're aways facing the camera. Is there a way to set the pan/tilt/roll on particles?

Any help would be appreciated.