that should tell you which rpm or tar.gz to download.
another option for you woudl be to download the .src.rpm file
after you have it downloaded, you run
rpm --rebuild "NVIDIA_kernel-1.0-3123.src.rpm"
it will kick out a bunch of code. You're supposed to look and see where in the code it says "wrote path/to/RPMs/NVIDIA_kernel-1.0-3123.i386.rpm"
then from that point you run
rpm -ivh (that path above) and it should go! the GLX file should work right off the bat. without that messy procedure. the Nvidia readme has much better step by step if you need it.