Quote Originally Posted by Cabhan

The command itself is not "jens". I can see where you got that from. The command is:

sudo apt-get install build-essential linux-headers-`uname -r`
First time someone took me for a command, I wonder what "man jens" would tell

Can I just get the necessery packages, burn it on a CD, point apt to my CD drive and do the install that way? If yes, what's the apt config file that defines where it's supposed to be looking at?
You can install them like this:
sudo dpkg -i package.deb