If there are more than 4 of that car and you only want to replace 4 of them you will have to do them one at a time. If there are only those 4 present...
Take a look at the list of keyboard commands. There are several options there to slow down or stop precipitation, change fog and clouds etc. All can...
You do not need to move TSRE. When you run TSRE it is not looking for OR, it is looking for your trainset and routes folders which should NEVER be in...