SAP ECC V6.0 SR3 IDES Oracle 10.2.0.2 64 Bit

I trying to install on 10.2 but it always tell me that the oracle not installed. I want to avoid addition extended cost for oracle patch 10.2.0.5 if possible. Can we install 4.6c on oracle 11.2 (i tried but am facing the same issue described in thread 4.6C Database instance installation for Oracle 10.2.0.2 64 bit )?

SAP ECC V6.0 SR3 IDES Oracle 10.2.0.2 64 Bit