There is an NVchooser script on the driver download page. Download it to your home directory.
Open up a terminal, and do a sh NVchooser.sh to see which packages you should download.
As for the "error code 1", I don't have any idea what that error code 1 really means, so I don't know what would have been wrong with it. The text of the error message would be more helpful, but run NVchooser first.
Also note that installing the RPM is not all you have to do. You have to edit your X config file so that X uses your driver. This is detailed in the README, but basically you find out which file to use, then make sure it says Load "glx", and doesn't say Load "dri" or Load "GLcore", and also change Driver "nv" (or Driver "vesa") to Driver "nvidia". Save and exit.