Switching R/3 source systems

Hi SDN gurus,

We have a scenario where we sould like to change a test R/3 source system in our BI7 box. Currently there are lots of flows from QA1 (old style datasources/transfer rules etc), if a new R/3 system QA2 is created and connected, is there a way to convert the transfer rules/InfoPackages etc to pick up the new system. I'm trying to avoid retransporting all the objects from dev again with a new system mapping from/to value as there are projects currently starting in dev which complicates things.

Is there a program or function module that can help ?

Cheers,

Rob.