It's not enabled because the module's name changed starting with 4191. It's now named nvidia, not NVdriver. So change the options line.
I think the other problem (where modprobe complains about an invalid syntax) is because you probably can't have 2 options lines for the same module. Put both of them together on one line, like so:
options nvidia NVreg_EnableAGPFW=1 NVreg_EnableAGPSBA=1
, rerun /sbin/depmod -a, unload the nvidia module, and re-/sbin/modprobe it. If that works, then reboot and make sure it still does.