Business system re-point

Hi all,

We need to re-point all the interfaces in our PI system from one R3 system to another so we need to change the Business system. We can not do it via transports as it is the only PI system that we have at the moment. Is it any way to do it automatically? -we can not mantain the BS name-

I know it is not a typical question and we are not sure if there is a way to do it but it can prevent us to re-point more than 100 interfaces manually....

Thanks a lot!!

Diana