how to clone via RMAN?

Has anyone restored a database via RMAN from one node to another. 
The ORACLE_SID will be different and also the directory structure will be 
different.
 
If so, can anyone provide some pointers.
I've found a couple of documents on Metalink: 73912.1 and 73974.1 but they 
don't exactly cover my particular scenario.
 
9.2.0.4 on Solaris 2.8.
 
PS 
 
This is also a RAC database.
 
TIA
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