After going thru all necessary documents, I understand that BI can be implemented one of the following way
1. Install NW 7.0 SR3 with AS ABAP ,AS Java, EPC and EP then add BI_cont_7.03 to make BI instance ready.
2. Install ECC 6.0 and add BI_cont_7.03. Make a client copy with sap_all profile so that this client will act as BI client. (This is just testing purpose and not recommended by SAP)
Am I correct? Please correct me if I am wrong.