Good try, but not quite.
Let's say I had put a file from Dell in my Download folder and unzipped it.
I would expect to see in that Download folder a 'driver' folder.
In that driver folder I would see a lot of files - maybe even more folders depending on the complexity of the driver.
For my broadcom 4318 card I know the driver file I am looking for is bcmwl5.inf and let's say for illustration it is in the driver folder.
I would use the command:
ndiswrapper -i /home/bbfuller/Download/driver/bcmwl5.inf
Your challenge is to find the inf file in that package for your card. For broadcom it usually turns out to be bcmwl5 but sometimes bcmwl6 and to specify the full path to it.
Don't forget, file and folder names in Linux are case sensitive.
In case the instructions you are following don't mention it, Windows Vista drivers don't work with ndiswrapper, they must be Windows XP drivers.