Sim.
Basta instalar seu x86_64 e seus pacotes i386 / i686 usando o comando rpm
da mesma maneira que o usual.
Existem vários exemplos de pacotes de arquitetura mista que precisam coexistir. Olhe para a glibc ou de um dos meus outros sistemas ... Observe as duas entradas.
[root@LAX ~]# rpm -qi zlib
Name : zlib Relocations: (not relocatable)
Version : 1.2.3 Vendor: CentOS
Release : 27.el6 Build Date: Wed Dec 7 09:54:41 2011
Install Date: Fri Nov 30 12:50:28 2012 Build Host: c6b18n1.dev.centos.org
Group : System Environment/Libraries Source RPM: zlib-1.2.3-27.el6.src.rpm
Size : 152225 License: zlib and Boost
Signature : RSA/SHA1, Thu Dec 8 13:48:00 2011, Key ID 0946fca2c105b9de
Packager : CentOS BuildSystem <http://bugs.centos.org>
URL : http://www.gzip.org/zlib/
Summary : The zlib compression and decompression library
Description :
Zlib is a general-purpose, patent-free, lossless data compression
library which is used by many different programs.
Name : zlib Relocations: (not relocatable)
Version : 1.2.3 Vendor: CentOS
Release : 27.el6 Build Date: Wed Dec 7 09:51:15 2011
Install Date: Fri Nov 30 13:58:46 2012 Build Host: c6b18n1.dev.centos.org
Group : System Environment/Libraries Source RPM: zlib-1.2.3-27.el6.src.rpm
Size : 139037 License: zlib and Boost
Signature : RSA/SHA1, Thu Dec 8 13:47:42 2011, Key ID 0946fca2c105b9de
Packager : CentOS BuildSystem <http://bugs.centos.org>
URL : http://www.gzip.org/zlib/
Summary : The zlib compression and decompression library
Description :
Zlib is a general-purpose, patent-free, lossless data compression
library which is used by many different programs.