install both i386 and x86_64 libs

Hello,

Forgive me if this has been asked before, I have searched the archives
and google with no luck.

I would like to install both the i386 and x86_64 libs for Postgresql
8.4.3 on an x86_64 CentOS 5.4 machine. I need there to be a
/usr/lib/libpq.so.5 lib and not just a /usr/lib64/libpq.so.5.

I have installed the pgdg rpm to get the repository for pgdg, but it
will only install x86_64 versions. I have tried duplicating that repo
and using i38 as the arch, but I can't install
postgresql-libs-8.4.3-1PGDG.el5.i386 because it complains about
postgresql-libs-8.4.3-2PGDG.el5.x86_64 already being installed and newer.

Is there a simple way to get both version of the libraries installed?

Thanks,

Sean