To find out if a package is installed on systems that use rpm, you can do
Code:
$rpm -qa | grep -i packagename
So for ndiswrapper, you would do
Code:
$rpm -qa | grep -i ndiswrapper
If ndiswrapper is installed, the output from that command should show you the version. If its not installed, then you won't get any output.
To install wireless drivers, you should be able to do something like
Code:
ndiswrapper -i /path/to/driver.inf
Detailed info is available
here.