SAP BPC STARTER KIT FOR IFRS - financial close and disclosure management

Hi guys

i just need your support to answer my q

our customer needs to implement RDS financial close and disclosure management for sap bpc nw 10

i have already installed the component but i just need to know how to apply customer requirement on the RDS ?

i mean that customer has different entity hierarchy and chart of account

so i need to know am i going to delete the RDS chart of account and upload his own chart of account or am i going to create transformation files for both chart of account

and what about the entity dimension ?

cause if i changed the chart of account or the entity hierarchy this mean that i need to modify every single logic script ,business rule ,reports and controls .

please guide how to apply the rds with cst requirements

PS : cst needs to upload data using flat files not from BW