Oracle RAC cannot be made a cluster in non-global zone.
When you allocate the image of non-global zone on shared disks, create the volume for Oracle Database allocated on the shared disk class for non-global zone where Oracle is installed.
When you allocate the image of non-global zone on a local disk, create the volume for Oracle Database allocated on shared disk class, and enable it to access from non-global zone.
The configurations which support PRIMECLUSTER Wizard for Oracle 4.2A02 operating on an Oracle Solaris Zones environment are as follows.
global zone OS(*1)  | Non-global zone type(*2)  | Oracle Database Edition  | Version and/or level  | 
Oracle Solaris 10  | Oracle Solaris 9 Containers (OSLC)  | Enterprise Edition Standard Edition  | R9.2.0(32bit/64bit) R10.1.0 (64bit) R10.2.0 (64bit) R11.1.0 (64bit)  | 
(*1) You need PRIMECLUSTER 4.3A20.
(*2) You need PRIMECLUSTER 4.2A00.