System copy for PI 7.0 system

Hi,

We are doing system copy for complete landscape and every time we used to perform PI system copy using SAP standard procedure of backup/restore, Java exp/imp.

But can we use another approach of exporting IR/ID from source to Target. Because we do not have any transactional data in PI and what are different things that we need to take care if we export individual components.

Like new ports, we20,we21, IDX1,IDX2

Thanks,

Venkat.