RHEL 6 x64: running 32 bit applications
Solution 1:
The fix in RHEL6 or in derivatives of RHEL6 is to add the parameter multilib_policy=all in your /etc/yum.conf file and that should work out.
It will enable fetching packages of all architectures and is not limited to the 64 bit versions only.
Solution 2:
I think it is just
yum groupinstall "Legacy Software Support"
That will allow people in 64bit userland to run 32bit apps
yum groupinstall "Legacy Software Development"
That will allow people in 64bit userland to compile 32bit apps