Unzip the ZIP file. Inside it there is a single ISO file; this is the image of the CD. Now you can write the .ISO file to CD using Nero (write CD image) or using a free utility called BurnCDCC. Find it here: http://www.snapfiles.com/get/burncdcc.html
All the software are available on download from usa.canon.com
I downloaded everything I needed recently from there, even Photo Professional, which I am beginning to enjoy.