well the nvidia 302 driver is very old
the current nvidia kmod for el6 is the 310
for red hat enterprise linux 6.4 ( the current )
yum should show 310 ( if you installed elrepo )
with the elrepo installed ( it has the nvidia kmod )
Code:
yum search nvidia
---- from the list install the current --
yum install kmod-nvidia
and that will grab the required rpms that it needs
you will also need to blacklist the opensource " nouveau" driver and rebuild the boot image
without the nouveau driver
search red hat knowlage base for the instructions
this is RHEL6 so you
do have the required and paid for support contract
https://access.redhat.com/search/quick
you will need to login to red hat with the credentials you set up when you bought the required support contract