Pre-intel iMac installing Snow Leopard?

Have been told by Apple that the Serial Number for my pre-Intel iMac enables me to install Snow Leopard (currently running 10.4.11). Is this straightforward or should everything be backed up before the installation? I had previously been led to believe that it wasn't possible to instal SL on this Mac. Confused and needing some clarity. Thanks.

Snow Leopard requires an Intel Processor.  Here are the specs:
General requirements
Mac computer with an Intel processor
1GB of memory
5GB of available disk space
DVD drive for installation
Some features require a compatible Internet service provider; fees may apply.
Some features require Apple’s MobileMe service; fees and terms apply.
Either they were wrong or your system does have an intel processor.  You should be able to determine that with "about this Mac".
Regards,
Captfred

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    Message was edited by: orch5

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    IS THE SITUATION HOPELESS
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    Graham Giles wrote:
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    Snow Leopard requires an Intel-based Mac, so as Niel indicated your iMac G5 cannot run it. The last version of Mac OS X your iMac G5 can run is Mac OS X 10.5.8.
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