32bit Oracle on Windows 2008 64bit ?

Firstly, sorry, but this is an elementary question...which versions/combinations of Windows Server 2008 and Oracle 10gR2 are "officially" supported ?
I understand that Oracle 64bit 10.2.0.4 is supported for 64bit Windows Server 2008 R1 (SP1 or SP2).
Similarly 32bit 10.2.0.4 on 32bit Windows Server 2008 R1 (SP1 or SP2).
Is 10.2.0.4 supported for Windows Server 2008 R2, which I understand is 64bit only ?
Is there any support (or even a mechanism) for running a 32bit version of 10.2.0.4 on a 64bit Windows Server 2008 (R1 or R2) ?
For example, we were able to get a 32bit ODBC stack connect to a 64bit instance of 10.2.0.4 on a 64bit Windows Server 2008 R1 machine....I'm realizing with our product we may need to support a 32bit 10.2.0.4 instance. Obviously not desirable or even logical, but a necessary stopgap. But I'm thinking while it is possible to get certain 32bit apps to run in a 64bit OS, I'm not sure Oracle can.
Any info, insights etc would be much appreciated. Am happy to rtfm if anyone can pass me references...

Is 10.2.0.4 supported for Windows Server 2008 R2, which I understand is 64bit only ?If i am remember correctly - no. But 10g R2 ist certified for Windows 2008.
Is there any support (or even a mechanism) for running a 32bit version of 10.2.0.4 on a 64bit Windows Server 2008 (R1 or R2) ?Mixing architectures (o/s and database) is not supported in any way.
For example, we were able to get a 32bit ODBC stack connect to a 64bit instance of 10.2.0.4 on a 64bit Windows Server 2008 R1 machine....I'm realizing with our product we may need to support a 32bit 10.2.0.4 instance. Obviously not desirable or even logical, but a necessary stopgap. But I'm thinking while it is possible to get certain 32bit apps to run in a 64bit OS, I'm not sure Oracle can.32-bit CLIENTS on 64-bit operating system are supported afaik. At the moment i am unable to login to metalink but as long as it is client-only you can use the 32-bit client on 64-bit operating system fully supported.
Ronny Egner
My blog: http://blog.ronnyegner-consulting.de

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