Crystal Server 2008 on Red Hat 6

I'm trying to install Crystal Server 2008 on Red Hat 6.0, but when running install.sh I get a message that some required patch is missing:

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Checking for recommended patches...

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Linux: Your system is missing required components (STU00120):

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Missing patch: unsupported.linux.release

If you continue your installation may not work correctly. (STU00109)

Please press Enter to continue...

Patch checking complete

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As Red Hat 6 isn't supported I also can't find any documentation about what's missing, but someone must certainly already have tried to install CS 2008 on RH6 and solved the problem ....

Anyone?