Comment 1 for bug 158631

Hi there
The "Add/Remove software" application is just to search common user applications, not core components AFAIK, for this kind of job you could use synaptic, which is available at "System -> Administration -> Synaptic Package Manager", or install it via command line with ej.

apt-get install linux-restricted-modules-2.6.22.14-generic

this should work if you have the restricted repository in your /etc/apt/sources.list.
I'm not really sure if this is a bug or a support request, i don't have a clean install machine to test this, but i think all the required applications are already there in a clean install, but if in doubt let's just leave this open until can be properly tested.

Please tell me if do you already have all the required applications installed, so the issue can properly identified.

Thanks in advance.