So you selected the second item in the bootcamp box (Download the latest windows support software. . .. . ) and it contained the 64 bit driver? On the cd it created for me the Nvidea 64 bit folder only contains ethernet and audio drivers but the 32 bit folder contains display drivers.
I used the option to create an USB stick and download drivers.
After windows installed I ran just the setup.exe in the USB WindowsSupport folder.
It installed all the drivers from just that one setup.exe.