Well, from what I gather, you put the .iso onto the cd but you did not burn the .iso's image onto the cd.
In order to acheive this you must use a cd burning program capable of it. I recommend the newest version of Nero Burning rom. You can get a fully functional free demo from
http://www.nero.com/en/631934351031098.php.
A guide on how to burn with nero can be found
here. Hit ctrl+f and paste "Use the following instructions for newer versions of Nero ( Contributed by Anthony P. )" (without the quotes) into the dialog to find the correct section.
I hope this helped. If not, you may need to burn a smaller boot image to a floopy disk in order to start the installation process.