Hey SouthernCross, don't mind my rambling.
Anyway, the software I mentioned well be an .iso file when you download it. You well need to burn the .iso image to a CD so it is bootable. There are many programs out there (free) that can do this, but I'll mention CDBurnerXP's method since that is what I use.
Go ahead and install CDBurnerXP on a seperate computer if you have access to one. Start it up and from the menu that appears, select "Burn ISO Image". It then pop up a new box for selecting the file and burn options. Select the button with three dots on it to browse for the ISO file you downloaded. Keep the rest of the default options and click "Burn Disc".
When the disc is finished, go ahead and eject and re-insert. Make sure that browsing the CD's contents show multiple files and not just the ISO file you downloaded. If there is only one file, then you'll need to re-burn.
Otherwise, take out the disc and go to the computer you are having problems with. Insert the CD and boot from it. At first, it may look like a screen of random words/numbers, but wait until a list of commands you can use shows up on the screen and just follow the instructions from there on.