to the forums. Your computer needs to be better than the minimum requrements for the game but there are no special requirements for the mod. When loading the mod just press OK and it should load anyway and you should be able to play the mod.
You don't download 7.0. You have to download an older version and then register on the winterberg mod website and download a keyfile. You then run the updater. There are instructions here.
You don't need a script. Put the Large Ambulance on standby or on patrol and when you call an ambulance with the EMS Captain/ Battalion Chief it will be called.
You have to send a police car and redirect the traffic from behind whatever is causing the problem. Then you have to move whtever is causing the problem.