To fix the nv thing, well, I'm not sure. I'd suggest deleting /usr/X11R6/lib/modules/drivers/nvidia_drv.o and reinstalling the NVIDIA_GLX package, for one.
To fix the "option xxxx not used" messages, I'd suggest you go and read through the nVidia README again. The place you have all those options (the Screen section) is not the right place in the config file. NvAgp, IgnoreEDID, NoRenderAccel, TwinView, SecondMonitor*, and MetaModes (at *least*, probably others) all belong in the Device section. The location of the others should be documented in the README.