The teaser pretty much says it all. I expect that ZENworks 11 SP2 will be the last version of the product to support Primary Servers running on 32-bit Windows or Linux servers. With the ZENworks "Pennsylvania" in 2012 we will be requiring a 64-bit server running a 64-bit platform. This allows us to fully leverage the hardware and further improve scalability of the solution. We will continue to support the ZENworks agent on 32-bit and 64-bit managed devices and satellite servers.
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.