I've been having problems with Ubuntu Software Center (4.0.5) freezing up while installing these packages. Another way to install these is through Terminal. I'm explaining two days to do this through Terminal. If you don't put anything on your desktop, then the first method is easier and faster; if you have .deb folders on your desktop, then skip down a bit to the second method.
For the first method, first download the packages to the Desktop ("~/Desktop"). If you download them to your "Downloads" folder ("~/Downloads"), then just open up the file manager and copy and paste it to the desktop.
Then press "ctrl + alt + t" to open up Terminal. Change directory to the Desktop by doing this:
Then install all of the .deb packages on the Desktop using "dpkg -i". If you have other .deb packages on the Desktop besides these 4, you should use the second method explained later.
Here's the second method. First, download the packages. Then press "ctrl + alt + t" to open up Terminal. Change to the place where you downloaded the packages, which is probably "~/Downloads". (Make sure "Downloads" is capitalized)
List the ".deb" packages in this folder.
Then install the packages using "dpkg -i". The order is very important here! Replace the "..." with the full name: whatever "ls" showed. Alternatively, you can open up the Downloads folder (using the file manager, which is called nautilus), copy the name of the package, and paste it in Terminal. However, when pasting things into Terminal, you have to use "ctrl + shift + v" instead of "ctrl + v".
For 64 bit:
sudo dpkg -i linux-headers-..._all.deb linux-headers-...i386.deb linux-image-...i386.deb
sudo dpkg -i linux-headers-..._all.deb linux-headers-...amd64.deb linux-image-...amd64.deb
It seems that the Ubuntu kernel team has started a new system of using four .deb packages instead of just three. Just tag "linux-image-extra-...i386" or "linux-image-extra-...amd64" to the end of the command line in the Terminal. It'll look like this:
For 64 bit:
sudo dpkg -i linux-headers-..._all.deb linux-headers-...i386.deb linux-image-...i386.deb linux-image-extra-...i386
Again, make sure you do it in this order. If "dpkg -i" doesn't work, I'm sure you can use "gdebi" instead. To do this, just replace "dpkg -i" with "gdebi".
sudo dpkg -i linux-headers-..._all.deb linux-headers-...amd64.deb linux-image-...amd64.deb linux-image-extra-...amd64