It will be much easier to hook up the machine to the internet and use synaptic/APT/Add and Remove software to install the software you desire. Here is a link to the Ardour file, you will see that it requires you to install many other software packages to work. Here is an instruction manual for installing software without an internet connection.
If this computer is going to be used solely as a studio computer I would install ubuntustudio. I know it's a pain because it doesn't fit on a cd. I suggest connecting your machine to the internet and just installing it by opening the terminal (applications>accessories>terminal) and entering the commands found here:
Code:
sudo apt-get update
sudo apt-get install ubuntustudio-audio ubuntustudio-audio-plugins linux-rt
I've never upgraded to Ubuntustudio personally, but I will offer you one important piece of advice. NEVER, install software using a method other than APT, synaptic, or "Add & Remove Software" unless you are specifically told to do so by someone here on the forums or it says so on help.ubuntu.com.
Once you are done installing the software, you can disconnect it from the internet. I suggest moving the computer to a location that has internet to install the software (maybe two hours if everything goes smooth) and then move it back to your studio when your are done.