[Peace-Maker]

I expected the bullet_impact event to exist in all games, but now that you bring it up, it looks like it's CS:S, L4D/2 only. I'm not relying on that event though, so it's easy to circumvent.

If you want to test it beforehand, just change line 121 from HookEvent to HookEventEx. You won't be able to shoot at positions though, but you're still able to set waypoints with "e" or the menu.