Installing RHEL 7 with 32 bit support

I am trying to find a way to install RHEL 7 with full 32 bit support. RHEL 6 - 64 would by default. I am installing from a usb key that has all of the rpms on it both 64 and 32 bit but when I run through the installation procedure there is no choice to install both 64 and 32 bit packages. Any ideas?
Thanks