RMAN Duplication for ASM to ASM

Hi 

1) We have one existing setup 4 node extended cluster RAC on rhel 4.7 with 10.2.0.5 cluster and 10.2.0.5 database on ASM. Full backups are taken on tape on weekends but incremental backups are taken on disk daily and then on tape.

2) Now we are creating a similar setup 4 node extended cluster on rhel 5.7 with 11.2.0.3 Grid and 10.2.0.5 database on ASM. 

We want to use RMAN duplicate for initial setup between first setup above and new setup.  We would like to know the possible approach to handle this. Also if someone can suggest appropriate MOS for this case.

Any help in this regard is appreciated.