I have implemented the same requirement following instructions from below blog https://wiki.scn.sap.com/wiki/display/PLM/Using+Sub-System+to+synchronize+PS+status+to+Project+Management+Project
Hi Aditya,You can first download data of Project, WBS, Network, Activity&Activity elements to separate Excels and create all these PS objects in the new system using respective Bapis.Same procedure applicable to other data like Plan, Budget, Actual c...