Tricking RedHat 9 into thinking it's RedHat Enterprise 3

I'm running RH9 and I have a peice of software that tells me it won't allow an install unless I'm running RedHat Enterprise 3. Is there anyway I can trick the installation program into thinking my RH9 is RH Enterprise 3? Where perhaps is it looking to see what OS I'm running?
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Well it depends what test the application does.
maybe changing /etc/redhat-release will suffice, but it may appear, that cheating kerel version or lib/sys call is needed.

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Are You familiar with strace (ltrace) tools, run the application through one of it.
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