Indeed, the Linux operating system comes with full printer drivers - including drivers for Kodak printers - and really is no harder to install than the Kodak printer driver CD for Windows. In that respect, you got good advise on how to get the Kodak printer running. But you will then be using Linux, not Windows - also a Good Idea IMHO.
I presume you went online to an Ubuntu mirror site and downloaded a file ending in the suffix ".ISO". If so, you need to burn that file onto a CD - best done by using the free Windows program ImgBurn found at at http://imgburn.com.
After burning, use ImgBurn to confirm the burn was successful [with ImgBurn's handy VERIFY option]. Then BOOT from the new CD. The CD must boot first - before your hard drive. If your CD doesn't boot first, pushing F12 during boot brings up a boot order menu for Dell, otherwise you can enter BIOS [look for a boot-time message on which key starts BIOS such as F2 or ESC] & change the boot order.
IMHO a better Linux distribution for you - as a US English-speaking Windows user - is PCLinuxOS. That ISO is available at http://getpclinuxos.com/KDE/
PCLOS may indeed be the current easiest-to-use Linux desktop distribution, whether
* for use from the CD,
* for installation to the hard drive [dual-boot with Windows instructions based on PCLOS 2007 are at http://www.ehow.com/how_2147183_add-linux-windows-computer.html ], and
* for the learning transition from Windows to Linux [which experience has shown me is even EASIER for the new computer user, BTW].
"Amazingly easy" and "nothing to it" are typical comments from those who have converted from Windows to the PCLOS version of Linux. With XP confirmed as being phased out by Microsoft in June, you won't be the first on your block to make the switch from Windows to Linux.
Good luck to you.
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Reading your feedback, you don't say the file name you "installed" or downloaded. A simple Google search for "Ubuntu ISO" will have given you dozens of links for its download. The main Ubuntu ISO download site is at http://www.ubuntu.com/getubuntu/download
You cannot have "already installed it" without knowing that information your first answerer asked for!???
Assuming you are seriously trying to install Linux, I'd say abandon Ubuntu and go for PCLinuxOS - by following the links in my post. Ubuntu is a "flavor" of Linux. PCLinuxOS [also called PCLOS] is another "flavor" of Linux. PCLOS has an advantage of presenting a much more comfortable interface for the Linux-uninitiated. It's just easier to work with though Ubuntu would also work fine.
So drop Ubuntu. Grab PCLOS as outlined above.
If you're still uncomfortable on what to do or what's going on, you need to involve someone who can read and follow the information already given to you.
Like most things in life - it's so simple once you've done it. A friend may have done enough similar things that - for them - it'll be clear and a cake-walk to get you and your printer up by booting the [PCLinuxOS version of a] Live CD of Linux.
With PCLOS booted and printer turned on, set up your printer by clicking on the Control Center icon [the Blue-outlined circle with the "X" formed by a screw driver and box-end wrench] and selecting "Hardware" and then "Set up the printer(s)...".