Yes, I ran: alter user sapsr3 account unlock trough sqlplus, then I ran r3trans -d again, there was ORA-01017, so I tried another password for SAPSR3 (I was not sure which one of these two is the correct one) running:
C:\Users\steadm>rsecssfx put DB_CONNECT/DEFAULT_DB_PASSWORD [2ndPassword]
then r3trans -d ended with zero status.
System still started for 2 seconds (start coulmn of disp+work processes turned to YES), so I switched back to kernel 731 from 740 and now it Works... finally.
Obviously kernel has to be switched sometime later during EHP installation...
Thanks for help.
Regards,
Martin