Homogenous system copy on NW 7.4

Hi Experts,

I have a basic query. The constraint of performing System copy with Oracle DB can be done only if the backup is taken using brtools?

If the backup is of native Oracle backup taken using RMAN and TSM can we perform the System copy using backup/restore method.. Please clarify..

Also in Netweaver 7.4 with Oracle DB 11.2.0.4 SSFS is been implemented so what will be the post installation procedure to update/maintain the password of SAPSchema SAPSR3 user similar to updating OPS$<sidadm>, I am aware that SSFS the password of SAPUSER is stored in file system but how does the connection get established and what post installation step must be done after System copy on the target system.

Please share your experience..

Thanks