according to your output, ndiswrapper is not installed on your machine.
If it were installed, the Repo line would say
installed and you would have a From repo line telling you what repo it was installed from.
Like this (package is ffmpeg, but you can see the difference I am referring to above):
Code:
Installed Packages
Name : ffmpeg
Arch : x86_64
Version : 0.10.4
Release : 1.fc17
Size : 635 k
Repo : installed
From repo : rpmfusion-free-updates-testing
Summary : Digital VCR and streaming server
URL : http://ffmpeg.org/
License : GPLv2+
Description : FFmpeg is a complete and free Internet live audio and video
: broadcasting solution for Linux/Unix. It also includes a digital
: VCR. It can encode in real time in many formats including MPEG1
: audio and video, MPEG4, h263, ac3, asf, avi, real, mjpeg, and
: flash.
try installing it..
yum install ndiswrapper