You've downloaded the wrong drivers. 1.0-4180 is the AMD64 (Hammer) driver. Unless you have a Hammer, you should download and install 1.0-4191 (the IA32 driver, intended for Athlon machines). Run NVchooser.sh if you're unsure of which files to download.
'nvidia.o' is the accelerated NVIDIA kernel module, and is what you're installing if you've downloaded files off of www.nvidia.com.
The 'nv' driver is the opensource 2D driver provided as part of XFree86. NVIDIA does not distribute the 'nv' driver.