we need to migrate sccm 2007 R2 SP2 central and primary site server to new machines in (same sccm 2007 r2 sp2) other datacenter

we need to migrate sccm 2007 R2 SP2 central and primary site server to new machines in (same sccm 2007 r2 sp2) other datacenter
central site server has three primary child server and 4 secondary server and sup role configured in remote machine and primary site server has 14 distribution points pointing to it

we are not doing back up and restore . please explain how we can do it side by side