system copy 32/64 bits

My customer is running on Linux Red Hat EL4/IA32 with Oracle 9.2.0 and wants to migrate to a 64 bits system running Linux Red Hat EL4/x86_64 with Oracle 10g release 2.

The sap version they are running is SAP R/3 Enterprise 47x200.

Can I do a homogeneous system copy with the R3load procedure (DB export) and use this export with the installation using the target I described above? Will Oracle be automatically migrated to 64 bits? Can I do an export from release 9 and import it in release 10?

Thanks in advance for your answer. Points will be rewarded.

Kind regards,

Dave Arends