[CentOS] CentOS 5.3 on X86_64: yum installs both i386 and x86_64 packages

Hello,

Is it advisable to clean up the system by deleting the i386 rpms? If so 
how do you know which ones to remove and which ones CentOS or RHEL 
require to be installed? You can use “yum list installed \*.i386″ to 
list all of the i386 rpms installed on your x86_64 system and I assume 
you could use “yum remove installed \*.i386″ to remove them all. If 
there were a few which were necessary to keep you could exclude them in 
yum.conf.

Thanks for the help,

Patrick