32-bit Libs on Centos

I just installed a web app on 64 bit Centos Server. I need to know what specific 32-bit libraries are needed to be installed.
Any help will be appreciated.

If you have a 64 bit Linux, you need to install the ia32-libs package.

Christian, I did not know the libs were all in a package, so I apologize for my question.
I appreciate your help on this.