depends on the situation.
what distribution?
what driver?
what hardware?
more info needed
If you want to install nvidia drivers manually you need to read the documentation. In your case it is located here..
ftp://download.nvidia.com/XFree86/Linux-x86/260.19.21/README/index.html
However i think nvidia driver version 260.19.06 is in the ubuntu repositorys in the package nvidia-current which you can install easily via "apt-get install nvidia-current" if its not already installed.
Nvidia drivers are a closed binary and so we don't know what the installer does precisely and so its hard to tell what the pre-requisites are without reading the readme.
I don't know why that package is showing as an old version on your system. Maybe your package lists arent updating for some reason. You can still install manually using the instructions I linked to.
EDIT - I take that back. I think its because you are on lucid and not maverick. For some reason the nvidia-current package is much less "current" on lucid. You'll need to manually install, or upgrade to maverick.
Why not simply try Mint, opensuse or fedora?
Sorry to hear that you are having so many problems with this "freezing" thing!!