I have to downgrade my test database from 9.2.0.3 to 9.2.0.1
I have backup of database from release 9.2.0.1 ( before upgrade on 9.2.0.3),and backup of controlfile,spfile,listener.ora,tnsnames.ora and pwd file.Database is in noarchivelog mode.

What is the most easy way of downgrade?

I thought:
1) Drop database and unistall oracle
2) Recreating of instance
3) With RMAN,restore controlfiles and datafiles ( but I realised that i have to do recover database,but with drop database I lose all logs).

Thanks,Zvonimir