Missing ia32-libs for 64 bit CentOS

Hi,

I've been trying to install Zimbra Desktop 7 on CentOS 5.5 using the usual perl script provided. The issue is, I get a warning that my system does not have ia32 libs. I dug a bit on google and found out that 'there is no such package as ia32 libs for Centos'. I also tried all the suggested work arounds like glibc & stuff, can anyone shed more light on this?

Here's the msg
'WARNING: ia32-libs is missing for x86_64 platform. This package is required to run Zimbra Desktop on 64-bit Linux.'


Regards,
EK.